REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 28 March 2019

HOW TO REMOVE HDD PASSWORD AND BIOS PASSWORD – ACER ASPIRE 5737Z SERIES LAPTOP COMPUTERS

HOW TO Remove HDD Password and BIOS Password – ACER ASPIRE 5737Z Series Laptop Computers

Acer Aspire-5737Z Series Laptops_BIOS password cleaning_HDD password removal _ BIOS recovery
TO REMOVE THE HDD PASSWORD
If you key in the wrong HDD password three time, HDD password error code displays on the screen.
To reset the HDD password, perform the following steps
1. From a DOS prompt, key in Unlock6.exe 05149 and press <Enter>.
The Unlock 6 program runs.
2. Select option 2, Upper case ASCII Code, and press <Enter>.
3. Make a note of one of the displayed passwords, for example B99TPK0, as shown.
4. Power off the system by holding down the power button for >4 seconds.
5. Reboot the system and key in the chosen password to unlock the HDD.
BIOS PASSWORD REMOVAL
If you key in the wrong Supervisor Password three times, System Disabled displays on the screen. See the image below.
To reset the BIOS password, run BIOS_PW.EXE as follows:
1. Key in bios_pw 14452 0
2. Select one string from the list.
Reboot the system and key in the selected string (qjjg9vy, 07yqmjd etc.) for the BIOS user password.
CLEANING BIOS PASSWORD
To clear the password, perform the following steps:
1. From a DOS prompt, Execute clnpwd.exe
Press 1, 2, or 3 to clean the desired password shown on the screen.
The on screen message determines whether the function is successful or not.
Steps for Clearing BIOS Password Check
If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask the password during systems POST or when systems enter to BIOS Setup menu. However, once it is necessary to bypass the password check, users need to short the HW Gap to clear the password by the following steps:
• Power Off a system, and remove HDD, AC and Battery from the machine.
• Open the back cover of the machine, and find out the HW Gap on M/B as picture.
• Use an electric conductivity tool to short the two points of the HW Gap.
• Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the system till BIOS POST finish. Then remove the tool from the HW Gap.
• Restart system. Press F2 key to enter BIOS Setup menu.
• If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and try again.
NOTE: The steps are only for clearing BIOS Password (Supervisor Password and User Password).
BIOS Recovery by Crisis Disk
BIOS Recovery Boot Block
BIOS Recovery Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous BIOS flashing process failed.
BIOS Recovery Hotkey
The system provides a function hotkey: Fn+Esc, for enable BIOS Recovery process when system is powered on during BIOS POST. To use this function, it is strongly recommended to have the AC adapter and Battery present. If this function is enabled, the system will force the BIOS to enter a special BIOS block, called Boot Block.
Steps for BIOS Recovery from USB Storage
Before doing this, prepare the Crisis USB key. The Crisis USB key could be made by executing the Crisis Disk program in another system with Windows XP OS.
Follow the steps below
1. Save ROM file (file name: JAL90x64.fd) to the root directory of USB storage.
2. Plug USB storage into USB port.
3. Press Fn + ESC button then plug in AC.
The Power button flashes once.
4. Press Power button to initiate system CRISIS mode.  When CRISIS is complete, the system auto restarts with a workable BIOS.
5. Update the latest version BIOS for this machine by regular BIOS flashing process.
Steps for BIOS Recovery by Crisis Disk
Before doing this, a Crisis Diskette should be prepared ready in hand. The Crisis Diskette could be made by executing the Crisis Disk program in another system with Windows XP OS.
Follow the steps below:
1. Power Off failed system.
2. Attach a USB floppy drive to the failed system.
3. Copy xxxxx.wph to tool's folder and rename it as BIOS.wph.
4. Execute wincris.exe to start the Crisis Disk Build.
5. Select Removable and click Start.
A confirmation screen displays.
6. Click the OK button on the left to continue.
7. Click the (N) button when prompted to complete the process.
8. Insert the Crisis Disk in to the USB floppy drive attached to the BIOS flash failed system.
9. In the power-off state, unplug the AC power and hold Fn+Esc then plug the AC power in.
10. Press the Power button.
The system powers on and the Crisis BIOS Recovery process begins.
BIOS Boot Block begins restoring the BIOS code from the Crisis floppy disk to BIOS ROM on the failed systems.
When the Crisis flash process is finished, the system restarts with a workable BIOS.
Update to the latest version BIOS for the system using the regular BIOS flashing process.
Posted By: FRANK at 06:34
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