Key And Touch Screen Trouble - LG GT500 Service Manual

4.5 Key and Touch Screen Trouble

4.5.1 Key Trouble
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
Press the key button
Key works well?
No
1
Check key button.
If Key button is pressed or
appearance is abnormal,
Change the key button.
works well?
No
2
Check BtoB connector(CN2)
Re-assemble CN2.
Check connector soldering.
Re-solder CN2.
works well?
No
Change the key FPCB.
works well?
No
Change Main Board
Yes
Finish
Yes
Finish
Yes
Finish
Yes
Finish
- 77 -
4. TROUBLE SHOOTING
LGE Internal Use Only