Main Lcd Trouble - LG GT810h Service Manual

4.13 Main LCD trouble

Main LCD control signals are generated by MSM7201A. Those signal's path are :
→
MSM7201A 20-pin LCD connector
Change the Main BD
Change the LCD module
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
→
LCD Module
START
Press END key
to turn the power on
Is th e ci rcuit po wered?
Disconn ect and r econn ect
20-pin B to B
conn ecto r
LCD display OK?
Check VREG_ LCD_2.8V, VREG_MSME_1.8V
LCD_RESET_N in Main BD
No
Yes
Display OK?
No
The LCD works
End
- 131 -
4. TROUBLE SHOOTING
No
Yes
Yes
No
No
Follow the P ower ON
trouble shoo ting
Yes
LGE Internal Use Only