LG R410 - RB410 - RV410 - RD410 SERIES HOW TO FLASH THE BIOS - BIOS-EC FLASH PROCESS - HOW TO UPDATE FLASH ROM IN DOS - BIOS RELEASE AND MAKING BOOTABLE CD

Before replacing parts make sure that latest BIOS and drivers are installed before replacing any parts (FRUs) listed in this.

Use the following strategy to prevent unnecessary expense for replacing and servicing parts

1. If you are instructed to replacing a part but the replacement does not correct the problem, reinstall the original part before you continue.

2. Some computers have both a processor board and system board. If you are instructed to replace either the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one.

3. If an adapter or device consists of more than one part, any of the parts (FRUs) may be the cause of the error. Before replacing the adapter or device, remove the parts (FRUs), one by one, to see if the symptoms change. Replace only the part that changed the symptoms.

Caution:  The BIOS configuration on the computer you are servicing may have been customized.  Running Automatic Configuration my alter the settings. Note the current configuration settings; then, when service has been completed, verify that those settings remain in effect.

Strategy for replacing a hard-disk drive

You have to get a User’s approval before formatting or replacing a hard-disk drive. You must let the User know that the user is responsible for the loss data.

Caution: The drive startup sequence in the computer you are servicing may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

Before the computer is powered-on after part (FRU) replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts.

Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble a standby battery, recharge it, throw it into fire or water, or short-circuit it. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

Before removing any part (FRU), turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables.

Processors

 Intel Core2 Duo/Solo/Mobile Intel Celeron Processor™(L2 Cache Size: 1MB/2MB/4MB/6MB/8MB, FSB:533/800MHZ are supported.).

The user must not replace or expand the CPU capacity arbitrarily. The CPU capacity differs depends on model type.

Main Memory

Maximum Capacity: Each slot is 2048MB and can be expanded to 4096MB.

SO DIMM Type for Memory Expansion: DDR2/DDR3 SDRAM SO-DIMM(256MB, 512MB, 1024MB, 2048MB)

Memory types and specifications may differ by model type.

To use two 2GB memory cards, the machine must run on 64bit OS. 32bit Vista/XP OS does not support 4GB memory.

Secondary Storage

2.5" Hard Disk Drive (S-ATA)

The hard disk capacity and the type depend on the notebook PC model.

Optical Disk Drive

The specifications may differ by model type.

Video

Mobile Intel Graphic Media Accelerator 4500MHD (Dynamic Video Memory Technology)

The DVMT actively utilizes part of the system memory when processing large graphic data like 3D graphics.

Therefore, the size of the graphic memory is displayed as the sum of the actual graphic memory size and the utilized amount of memory, which is decided by the size of system memory.

 NVIDIA Geforce 9600M GT (W/GDDR3 256M ) with TurboCache 320MB~1535MB

 NVIDIA Geforce 9600M GT (W/GDDR3 512M) with TurboCache 576MB~1791MB

 NVIDIA Geforce 9300M GS (W/GDDR3 256M) with TurboCache 320MB~1535MB

TurboCache - This technology actively utilizes part of the System Memory when processing large graphic data like 3D graphics. The size of the utilized memory is determined by the Video Memory size and System Memory Size.

If TurboCache technology is applied to the Graphics Memory, the System Memory can allot up to 320MB out of 512MB and up to 1791MB out of 4096MB for large graphic data.

 Specifications may differ by model type.

Block diagram

Fn key combinations

The following table shows the function of each combination of Fn with a function key.

Function of Fn keys has nothing to do with Operating System.

BIOS Flash

You can update BIOS using USB Device (FDD/USB Memory)

Because this system is not equipped with any USB Device, you have to use an external USB Device for a BIOS update.  In order to boot up with an USB Device, please set Removable Device as the first boot up drive in the boot menu of BIOS Setup.

How to update flash Rom in Dos

Create ‘boot up’ flash update USB Device (FDD/USB Memory).

2. Copy BIOS Flash software to the flash update USB Device (FDD/USB Memory).

3. Connect the USB Device for USB Port.

4. Press F12 Key while the "LG LOGO" appears.

5. A while later, the system setup home screen appears.

6. Type in “go.bat ”. (x_xxx is Model Name & BIOS version)

7. You can see the BIOS flash process as below.

8. After flashing is completed, the computer turns off with automatic movement.

10. Press [F2] Key, then you can see the BIOS SETUP UTILITY screen as below.

11. It selects the:” Load Optimal Dafault” and it summons a BIOS settings at initial value.

12. It selects the “Exit & Saving Change” and it stores system a settings and the reboot.

BIOS Release Process and Making Bootable CD

1. LGE(Korea) will upload BIOS Image(*.iso) to GCSC(Global Cyber Service Center:http://biz.lgservice.com) when BIOS should be updated.

2. BIOS will include both System BIOS and EC(Embedded Controller) BIOS.

3. Service center can download BIOS file from GCSC and update BIOS according to below procedure.

4. Service center will make Bootable Image CD with Image file(*.iso) as below.

a. Insert empty disc to CD-RW Drive and start Nero “StartSmart”.

b. Select “Nero Express”.

c. Select “Disc Image or Saved Project.

d. Select File Format as "Image Files(*.iso)".

e. Open Image File(*.iso) which is sent from LGE.

f. Tab Burn then burning will be started.

g. Burn process completed as below, and tab “OK.

BIOS / EC Flash Process.

1. Insert Bootable CD in PC, and Turn it on, then PC will boot by DOS mode as below.  (If the EC is not correct or old version, then automatically update EC first and reboot again)

2. Select Boot mode, then press “Enter” Key.

3. Type in LOGO SETTING at the “WIP ID :” then press Enter key (You must use Capital Letter)

4. Type in Mode Name at the “WIP ID :” then press Enter key (You must use Capital Letter).  (You can see the Model Name in ID Label at the bottom Case of PC: “M/N: LMXX-XXXX”).

5. Type in Serial No at the “WIP ID :” then press Enter key (You must use Capital Letter).  (You can see the Serial No in ID Label at the bottom Case of PC: “S/N: 412KIXXXXXXXX”(13digits))

6. You can see the BIOS flash process as below.

5. After flashing is completed, you can see the “PASS” on your screen, and reboot your PC.

SCHEMATICS / SERVICE MANUAL ACER ASPIRE 1360 SERIES: ASPIRE 1360, 1362LMI, 1362WLMI, 1363WLMI, 1362XC, 1362LC, 1362LCI, 1362WLC, 1362WLCI ACER ASPIRE 1520 SERIES: ASPIRE 1520, 1522LMI, 1522WLMI, 1524WLMI, 1522LC

SCHEMATICS / SERVICE MANUAL ACER ASPIRE 1360 SERIES: ASPIRE 1360, 1362LMI, 1362WLMI, 1363WLMI, 1362XC, 1362LC, 1362LCI, 1362WLC, 1362WLCI
ACER ASPIRE 1520 SERIES: ASPIRE 1520, 1522LMI, 1522WLMI, 1524WLMI, 1522LC

Wistron Block Diagram

Model:

WISTRON EGRET - DISCRETE 135W - REV SC

WISTRON EGRET - DISCRETE 90W - REV SC

WISTRON EGRET - UMA 135W - REV SC

WISTRON EGRET - UMA 90W - REV SC

WISTRON EGRET - VGA AGP -   I

WISTRON EGRET - VGA AGP -  II

WISTRON EGRET - VGA AGP - III

WISTRON EGRET - VGA AGP - REV SA

WISTRON EGRET - VGA AGP - REV SB

File type: pdf

Pages: - pages

Support model:

Acer Aspire 1360 series: Aspire 1360, 1362LMi, 1362WLMi, 1363WLMi, 1362XC, 1362LC, 1362LCi, 1362WLC, 1362WLCi

Acer Aspire 1520 series: Aspire 1520, 1522LMi, 1522WLMi, 1524WLMi, 1522LC

Wistron EGRET Schematics

Download schematics:

WISTRON EGRET - DISCRETE 135W - REV SC.pdf

WISTRON EGRET - DISCRETE 90W - REV SC.pdf

WISTRON EGRET - UMA 135W - REV SC.pdf

WISTRON EGRET - UMA 90W - REV SC.pdf

WISTRON EGRET - VGA AGP -   I.pdf

WISTRON EGRET - VGA AGP -  II.pdf

WISTRON EGRET - VGA AGP - III.pdf

WISTRON EGRET - VGA AGP - REV SA.pdf

WISTRON EGRET - VGA AGP - REV SB.pdf

____________________
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HOW TO CHECK 3V_5V(RT8206b) SYSTEM ON LAPTOP MOTHERBOARDS

Laptop Motherboard need 3V and 5V power system. This 3V_ALW supply VSB (voltage switch button)-EC Bios IC-EC (embedded controller)-SB(South bridge) and more other important component .5V supply power Source for any switching transistor and device .(USB-HDD-Optical etc).
Without this 3V and 5V Power circuit board will totally death.
RT8206A/B dual step-down, switch-mode powersupply
(SMPS) controller generates logic-supply voltages
in battery-powered systems. The RT8206A/B includes two
pulse-width modulation (PWM) controllers fixed at 5V/
3.3V or adjustable from 2V to 5.5V. An optional external
charge pump can be monitored through SECFB(RT8206A).
This device also features a linear regulator
providing a fixed 5V output. The linear regulator provides
up to 70mA output current with automatic linear-regulator
bootstrapping to the BYP(pin 9)switchover source voltage input for the LDO. .
The RT8206A/B includes
on-board power-up sequencing, the power-good outputs,
internal soft-start, and internal soft-discharge output that
prevents negative voltages on shutdown.
Checking this IC need to know how they work and knowing important input and output Voltage .

INPUT POWER
1.VIN (Pin 6) 6v-25V
Power-supply Input.This input value between 6V to 25V according adapter or battery usage and ADP+power source. VIN is used for the constant on-time
PWM one shot circuits. VIN is also used to power the
linear regulators. The linear regulators are powered by
SMPS1 if VOUT1 is set greater than 4.66V and BYP is
tied to VOUT1.

2.ENLDO (Pin 4) 6V-15V
LDO Enable Input. The REF/LDO is enabled if ENLDO is
within logic high level and disable if ENLDO is less than
the logic low level.This power input between 6V to 15V ,some of other circuit manufacture powered VIN or B+ and the other using diode .
After VIN and ONLDO power present LDO(pin 7) will having output for 5V than supply VL(Voltage Linear) to activate EN1(pin 14) and En2(pin 27).
EN1 is SMPS1 input enable than SMPS output will trigger Upper n channel gate trough UGATE1(pin 15) for 5V .
EN2 is SMPS2 input enable for UGATE2 than SMPS output will trigger Upper n channel gate trough UGATE1(pin 15) for 5V .High-Side MOSFET Floating Gate-Driver Output for SMPS1. and swings between PHASE1/2 and BOOT1/2.

PVCC (pin 19) PVCC is the supply voltage for the low-side MOSFET
driver LGATEx. Connect a 5V power source to the PVCC
pin (bypass with 1uF MLCC capacitor to PGND if
necessary). There is an internal 10Ω connecting from
PVCC to VCC. Make sure that both VCC and PVCC are
bypassed with 1uF MLCC capacitors.PVCC input coming from VL .if LDO no voltage present than PVCC will not triger Lower n channel mosfet.VCC (pin3) is analog suplay input voltage for PWM core.with out this power SMPS will not activated .Be aware also PGND need for SMPS power ground..

If VIN present 6-25V and ONLDO present 6 to 15V but LDO not present .check feedback on pin 7 LDO.if there is no feedback positively RT8206B damage.

If VIN present 6-25V and ONLDO present 6 to 15V and LDO present for 5V positively RT 8206B on good condition .Make sure LDO continuity to VL and triger EN1 and activated SMPS1.SMPS2 will activated after SMPS1 activated and become gate driver for both upper n channel 3V and 5V.
If all power above available but Ugate1 and 2 doesn't comes out check FB1 SMPS1 Feedback Input. Connect FB1 to VCC or GND for fixed 5V operation. Connect FB1 to a resistive voltagedivider
from VOUT1 to GND to adjust output from 2V to
5.5V.and do same way for FB 2 to adjust output from 2V to 3.3V.

MOSFET TYPE ON LAPTOP MOTHERBOARDS

There are  4 type of mosfet's SO8 on laptop motherboard
1. P channel mosfet
2.N chanel mosfet
3.dual P channel mosfet
4.Dual N chanel mosfet
each type could substitute as long as same type even with different marking code.
Easy way to identified look at the end number of marking code .
example  :
AO 4433 look at end of marking code number is odd numbers ( 3 )

this is P channel
example   : AO 4407 (7) is odd number ,this is P channel too,
they could be substitute each other even different manufacture and code.
Others P chanel examples :
AF 4825-AM 3423-FDS 6679-SI 4835 ETC




Other example : AOD 4466

look at last number of marking code it is even (6) numbers it's mean this is N channel mosfet and they could replace by other N channel even different
manufacture and code .

 Others N channel mosfet examples: AO 4800

AO 4474-AP 4232-FDMC8844-SI 4812 ETC

those mosfet identified only for SO8 mosfet.

  There are only 3 pcs P channel there ,2 pcs ADP(adapter) fet's and 1pcs Bat (battery)fet .some
motherboard also may have 1 adp Fet,some replace with diodes to supply every adapter supply need.
I call it "VALW MAIN LINE" .from this line  Battery ic and dc/dc power supply ic get VCC to powered each ic and this main VALW line also distributed adapterVoltage to every N channel Source ,before they got enable trigger to produced 3 and 5V_ALW......

P-channel mosfet works  drain is a input for nagative supply and source is a output for nagative supply ,and it's gate on with nagative volt .same way if you want to drive positive supply from p-channel mosfet then souce is input and drain is output for positive supply .


This is How 2 pcs P chanel replace by 1 Dual P chanel Mosfet

How DC/DC main power supply open/close gate N channel to produce 3V and 5V_ALW and important signal enable/disable function to activate the DC/DC main supply ic (ISL 6237-RT 8206-TPS 51247)

We will also found (SO3) P channel ,(SO8)  mean mosfet have 8pin and (SO)3 mean they
have 3 pin.And this (SO3) also have P or N channel type .so be ware if you
want to make replacement .just make sure replace it whit same type .

Other way to Identified for (SO6) and (SO3) Mosfet transistors are by finding the marking code on ic than
browse the data sheet , if they not found get mosfet location code on board than
find on schema by typing marking code to adobe reader search column to look the correct marking code than browsing the datasheet again to get know mosfet type and get substitution...
this is one of sample N channel (SO3) code  : 2N7002 -P0603BDG

samples (SO3) P channel mosfet :
FDD6685 - SI12301 -TP0610K.
sample datasheet link for N channel (SO3) 2N7002 : http://www.fairchildsemi.com/ds/2N/2N7000.pdf

2 mosfet in one package ,it is a simply vrm switching mosfet circuit in single mosfet package ,drain connected with diode cathode and source is connected with anode that how to identified  a N-Channel mosfet.

N chanel caracter common base

n-channel mosfet voltage flow is drain to source for positive supply - when you apply + positive volt in gate then this mosfet drive voltage drain to souce ( gate works same as transister base) if you want to drive nagative volt from n-channel mosfet then nagative volt drive source to drain mean for nagative volt input is source and output is drain

n channel mosfet logic low (vi) that mean mosfet not close circuit between the drain and source ,v_out you got vdd voltage via resistance . (Hi)
when you apply vi = Hi in N-Channel mosfet ,mean drain to source connected (close circuit) in this case you got v_out source low you can got at v_out .same way in P-channel but gate work reverse as n-channel mosfet work

ACER ASPIRE V3-571 - V3-571G ACER LAPTOP DISASSEMBLING – STEP BY STEP DISASSEMBLING PROCEDURE – BIOS FLASH – DOS FLASH UTILITY – CRISIS DISK UTILITY ACER ASPIRE V3-571 - V3-571G

 Acer Laptop disassembling – Acer Aspire V3-571 - V3-571G – Step by step disassembling procedure – BIOS flash – DOS flash utility – Crisis disk utility Acer Aspire V3-571 - V3-571G

Acer Aspire V-3 571 Laptop disassembly

BIOS Flash
BIOS Flash memory updates are required for the following conditions:
# New versions of system programs
# New features or options
# Restore a BIOS when it becomes corrupted.
Use the Flash utility to update the system BIOS Flash ROM.
Perform the following to run a BIOS Flash update:
1. Prepare a bootable USB HDD/FDD.
2. Download and copy the Flash utilities to the bootable USB HDD/FDD.
BIOS Flash may be performed by one of the following:
# DOS Flash Utility
# WinFlash Utility

DOS Flash Utility
NOTE:
Plug the AC power adaptor to a power source before performing the DOS Flash Utility.
Perform the following to use the DOS Flash Utility:
1. Copy Flash.BAT to the USB HDD.
2. Press F2 during boot to enter the BIOS Setup Utility.
3. Select Boot menu to modify the boot priority order.
4. Move the USB HDD to position 1

5. Insert the USB HDD and reboot the computer.
6. Enter the BIOS folder.
7. At the command prompt, type BIOS.bat and press Enter to update BIOS.

Creating a USB Flash Crisis Disk
To create a Crisis USB flash disk, perform the following:
1. Plug in the USB flash disk.
2. Format the USB flash disk: select Quick Format, then click Start and then OK.

3. Complete the format operation: click OK and then Close.

4. At the command prompt, copy and combine KBC (*.ROM) and BIOS (*.BIN) into one ROM file
(*.FD), using the format below:
Copy /b filenam.ROM + filename.BIN filename.FD

5. In Windows, copy the ROM (*.FD) file to the USB flash disk root directory.

NOTE: Do not save another ROM (*.FD) file in the USB flash disk root directory.
6. Rename the ROM file to “Q5WV1X64.fd”.

Using the Crisis Utility Disk
1. Unplug the AC adapter.

2. Remove the battery.

3. Plug the USB flash disk.

4. Press and hold <Fn> and <Esc>, and then plug the AC adapter.

5. Press the Power button to start the Crisis Utility.

Battery Pack Removal
1. Place the computer on a flat surface with the battery side up.
2. Insert the plastic pry into the battery latch and slide to to release the lock.
3. Lift to remove the battery pack.

DISASSEMBLING PROCEDURE 

Base Door Removal

Prerequisite:
Remove the battery
1. Remove the screws marked in the picture

2. Insert your finger into the tab and lift to remove the base door.

The following modules are housed under the base door:

# HDD (Hard Disk Drive) module (A),
# WLAN Module (B),
# DIMM (Dual-In Memory Module) Module) (C),

Base Door

1. Align the base door tabs into the lower case latches, then push to secure the base door.

2. Secure the screws.

ODD Module Removal

Prerequisite:
Remove the battery
1. Remove the screw securing the ODD module to the lower case.

2. Pull to remove the ODD module out from the slot.

HDD Module Removal

Prerequisite:
Remove the battery
1. Locate the HDD Module
2. Slide the HDD module to disconnect the HDD from the main board connector.

3. Pull by the plastic tab to lift the HDD module.

Palm Rest Removal

Prerequisite:
Remove the battery
1. Remove the 21 screws from the lower case.

2. From the right side, pry open the palm rest.

3. Continue to pry open the palm rest from the bottom side to the left.

4. On the underside of the palm rest, remove the adhesive tape covering the touch-pad cable connector.

5. Flip up the connector clip to open, and then disconnect the touch-pad FFC (flat flexible cable).

Upper Case Removal

Prerequisite:
Remove the battery
1. Remove the screw from the upper cover and the main board.

2. From the right side, pry to release the upper case latches.

3. Continue to pry the upper case through the top side and to the left.

CAUTION:

Cables are connected underneath the upper case. Do not completely lift the upper case.
4. On the underside of the upper case, disconnect the power board cable connector from the main board connector.
TIP: Push the connector clips outwards to remove the power board cable connector.

5. Disconnect the touchpaper cable connector from the main board connector.

6. Remove the adhesive tape covering the keyboard cable connector.

7. Disconnect the keyboard cable connector from the main board connector.

The following modules are found:

# DC-In Module (A)
# Speakers (B)
# LVDS Cable (C)
# Microphone Module (D),
# RTC Battery (E)
# USB Module (F)

SAMSUNG Q45 LAPTOP COMPUTER TROUBLESHOOTING, BIOS BEEP CODES

Samsung Q45 laptop computer troubleshooting, bios beep codes

LCD Related Troubles
The screen is dark or the colors of the screen are distorted.
* Check the connection status between the LCD module and the LCD cable, between the LCD cable and the main board LCD connector and between the LCD cable and the LCD inverter.

*  Replace the LCD cable or LCD inverter.*  Check if there is a part of the LCD that is bent or broken due to impact.

No picture appears on the screen.
*  Check the connection status between the LCD module and the LCD cable, between the LCD cable and the main board LCD connector and between the LCD cable and the LCD inverter.*  Replace the LCD cable or LCD inverter.*  Check if the System LED of the main board is blinking. (Check if it is operating or not)*  Check if the memory module is out of order.*  Check if the Power button can be normally pressed.

The LCD brightness is not adjusted.
* Check if the LCD inverter is out of order.* Check the BIOS version and check if the standard adapter is used.* Replace the LCD cable or LCD inverter and check if it is out of order.

The LCD blinks while the system is in operation.
* Check if there is a magnetic body near the touch pad button or the system or check if there is an exterior defect to the LCD or system.* Replace the LCD cable or LCD inverter and check if it is out of order.* Check if a standard adapter is being used (R20/R21:19V/3.16A/60W).

Main System Troubles

The system is not turned off.
* Check if the AC adapter LED is lit and if the adapter is properly connected to the system.
(Check the adapter LED)* If the AC adapter is not connected, check the charge status of the battery. Even if the battery is charged, if the remaining battery charge is too low, the system may not be turned on. (As the following figure shows, press the PUSH button on the battery and check the remaining battery charge via the LEDs)* Check if there are any alien substances in the Power switch. if have, change the LED.

Although system power is supplied, the system does not boot or immediately turns off after being turned on.
* Since this may be a short circuit in the system, disconnect the power immediately, disassemble the system and check if there are any conducting alien objects such as a screw inside.* Check the connection status between the CPU and the RHE.* Replace the memory module and check if it is out of order.* Reset the RTC Reset terminal next to the memory socket.
Remove RTC cable from RTC connector.

Connect the two pad of the cap for a while.

The Express card is not inserted or the Eject button does not work.
* This may occur when the insulator within the Express card slot is enwrapped.* Replace the Express card slot frame and check if it is out of order.

There is no sound from the speaker.
(Insert the figure of the audio jacks so that the reader can check via the figure.)* Check if the earphones or headphones are connected to the MIC jack of if there are any alien substances in the jack.

* Check if the sound is muted after booting up Windows.* Check the connection status of the speaker cable and check if the speaker is out of order.* Check if there is a magnetic object near the speaker.

Cannot hear sound through the headphones.* Check if the sound is muted in Windows.* Turn the volume up.* Replace the main board.

The external microphone does not work normally.
* Check the audio driver settings and change them if necessary.
Selecting the "1. Front panel microphone" option activates the external MIC.

* Replace the main board

The HDD is not recognized.
* Check the connection status of the HDD connector. fixup HDD, check whether the system can be found. if not,change the connector on the motherboard and check again.

* If the 'Operating system not found' message appears during the booting process even though the HDD is recognized by CMOS, the operating system of the HDD may be corrupted or the HDD is out of order. In this case, format the HDD and reinstall the operating system or replace the HDD with a new one.

The Touch Pad does not work or is malfunctioning.
* Check the connection status of the Touch Pad FFC.* Check the connection status of the Touch Pad module.

* If there is no problem with the connections, replace any suspicious parts and check if they are out of order.

The battery is not charged or the battery charge LED malfunctions.
* Check the standard voltage of the adapter.

* Check if the battery is defective.* Replace the main board.

The LAN function does not work.
* Check if the LAN cable is properly connected.* Check if the LAN driver is properly installed.* If the driver is properly installed, check if the LAN cable jack is out of order.* Replace the main board.

The USB function does not work.
* Check if the USB jack is out of order.* Replace the main board.

The wireless LAN does not work normally.* Check if the WLAN slide switch is in the ON position.* Check if the WLAN driver is properly installed.* Check if the wireless LAN antenna cable is properly connected.

* Replace the main board.

The Fan does not work normally
* Check if the Thermal is locked tightly.* Check if the Fan cable is properly connected.

When booting up the computer

The "Invalid System Disk. Replace the Disk and then press any key" message appears.
* This message may appear when the connected USB memory or CD media does not include bootable data.* The "Reboot and Select the proper Boot device or Insert a bootable media in the selected Boot device and press a key" message appears.* Check if the signal and power cables are properly connected to the hard disk drive.

* Check if the hard disk drive is recognized in the BIOS SETUP.* The operating system on the hard disk drive is corrupted. Reinstall Windows.

The "To enter BIOS SETUP, press <F2>. To continue, press <F1>." message appears.
* This may happen when the BIOS settings are different from the system environment. In this case, setup the BIOS according to your system environment.* Press <F2> to enter the BIOS SETUP.* Check if the date and time are correct in the BIOS SETUP.* Save the settings and restart the system.

The 'CMOS Checksum error’ message appears.
* This message may appear when the CMOS battery of the main board is completely discharged.
In this case, replace the battery with a new one of the same type and set up the BIOS SETUP according to your system environment.

Windows boots up in safe mode.
* This may happen when Windows was not shut down normally. Therefore, shut down the system by selecting Start > Turn Off Computer.* This may happen when the system settings have been incompletely recognized.* Run Check Disk.

Cannot boot up the computer with a USB floppy drive or from USB memory.* Check if the diskette is bootable.* This may happen when the booting priority of the device is low. In this case, change the booting priority in the BIOS SETUP.

When shutting down the computer

The computer is not shut down
* If Windows does not end normally, you can forcibly shut down the system by pressing the Power button. If the power-saving feature is activated on the Power button, press the Power button for more than 4 seconds to turn the computer off. If the computer is then turned on again,
Check Disk is automatically run.

Windows / Screen Related Problems

The computer hangs while running a program.* If the running program causes an error:
In Windows XP, press the <Ctrl>, <Alt> and <Del> key combination, select the application program and click on End Task in the Applications tab of the [Windows Task Manager] window.
In Windows 2000, press the <Ctrl>, <Alt> and <Del> key combination, select the application program or an application that does not respond and click on End Task in the [End Program] window.

* If Windows does not respond, restart the computer. Restart the computer by pressing the Power button.

No picture is displayed on the external monitor.* Press the Switch LCD/CRT Monitor function key and check if the screen output is output to another display device.* Check if the hardware is out of order referring to the descriptions in the LCD related section of the Hardware Troubleshooting.* For models with external graphics, replace the VGA board and check if it is out of order.

CD/DVD-ROM Related Troubles

Disc is not recognized or read.
* Check if the ODD module and the main board are properly connected with the 50 pin connector.* Replace the ODD, if necessary.

Power-Saving Mode Related Troubles

Connecting a USB device to the computer in standby mode.
* If a USB device is connected to the computer in standby mode, the screen may be abnormally displayed.
You have to connect a USB device when the computer is operating normally.

A USB device is not working normally when the computer returns from standby mode.* In this case, separate and reconnect the USB device.

The picture is displayed abnormally when the computer running the Command Prompt (MS-DOS)
enters standby mode and then returns from standby mode.* Press the <Alt> and <Tab> key combination to display the picture on the screen.

Device Settings Related Software Diagnosis

Check if the drivers of each of the devices are properly installed. That is, check if there are any yellow exclamation marks in the Device Manager.

Check the device driver version and check if it is conflicting with another driver. If the driver is not properly installed, install a new driver.
(The following figure illustrates the properties of the Internal GFx device driver).

Check if the program is properly installed.

Click on the Realtek Control Panel in the Control Panel and check if the function works normally.

HDD and ODD Related Problems
For an HDD, check if the HDD operates in Ultra DMA Mode 5 by selecting the Primary IDE Channel in the Control Panel as follows. If it does not, check the BIOS SETUP, reinstall the operating system or replace the HDD-FPC or HDD, if necessary.

For an ODD, check if it operates in Ultra DMA Mode 2. If it does not, check if the disc inserted into the ODD is clean. If the disc is contaminated, the access speed may slow down. If the disc is clean, check the BIOS SETUP, reinstall the operating system or ODD, if necessary.

Check if the HDD and ODD models are properly displayed. If not, check the BIOS SETUP or replace the FPC or drive, if necessary.

Windows Vista System
The operating system(OS) installed on this product is the latest version of Windows Vista, You cannot install an operating system other than vista as well as any unauthorized copy of Windows Vista.
Other operating systems (Windows 98,Windows ME,Windows 2000,Windows XP,Windows 2003 Server,UNIX and LINUX.other Windows Vista versions,etc.)other than the operating system already installed on this computer are not supported.
Installing a program that does not support Windows Vista, may cause the program to not work properly.
In this case, ask the corresponding software manufacturer about the problem . if you request the services to resolve a problem caused but incompatible software.

Other Problems
Press each corresponding button and check its operation.

System Diagnostics Card
The Diagnostics Card shows the system operations during the POST (Power On Self Test) in a2 digit hexadecimal number by connecting the cable to the 10 pin connector below the PCMCIA slot after separating the Top part. The card is used to evaluate the reason for the malfunction without disassembling the system when the system malfunctions and to test if the system operates normally after replacing a defective FRU.

Debugging Code
In general, if a defect of the circuit or part is detected during the system test, the system stops at a particular code. The error codes for each part of the system are listed in the following table.

Use of Debug card

See the debug card is connected to DEBUG connector (as following) in Main board.