HOW TO ENTER SERVICE MODE TO VIDEOCON 3634R _ 5443R _ 5134R [CHALLENGER]

To enter service mode:
Short contact the service key [Hidden] on the remote.
The screen display "Service".
Press digit (1) to enter into service mode.
Press digit (2) to enter into Design Mode.
Press digit (3) to enter to factory settings.
Press digit (4) to enter into Manufacturing Mode. [This mode is used rarely]
To call an item to adjust, use "UP" & "DOWN" keys on the remote control.
To adjust the data value to selected item, use Vol+ & Vol (-) keys on the remote control.
To exit from service mode, short contact the Hidden Service Key again.
To access the [Hidden] key, just peel out the front sticker on the botton side of the remote control.  You can see the hidden control hole there.  Won't be a button, but a hole.  Using the head of a small nail, you can short ciruit the carbon contacts inside the remote control board.  This one touch will activate the service mode.