4. TROUBLE SHOOTING
- 84 -
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
CHECKING FLOW
START
Is the voltage of TP1
around 1V When key
backlight on?
NO
Re-download
Or Replace U205
YES
Are all LEDs
Working?
NO
Check the soldering
each Register and LED
YES
Backlight
will work properly.