Lcd Electrical Troubleshooting Guide - LG DP381B Service Manual

LCD ELECTRICAL TROUBLESHOOTING GUIDE

Display condition?
YES
Power supply normal?
YES
7.5V, 15V, -10V normal?
YES
+5V normal?
YES
RGB signal output?
YES
VCOM signal?
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Only for training and service purposes
Appear shadow in
black backgroud
NO
NO
Check main B/D and repairing
NO
D16, D17, D18, D19 Check and Replace
NO
IC(U9) Check and Replace
NO
MTK1389P (Pin:184, 185, 187)
Check and Replace
NO
IC(U8) Check and Replace
3-3
LED Backlight/Driver abnormal
LGE Internal Use Only