LG DP381B Service Manual page 15

LCD ELECTRICAL TROUBLESHOOTING GUIDE
LCD TCON signal
normal? (ALL"LOW")
YES
TFT LCD normal?
YES
TFT LCD
Power supply voltage?
+15V, -10V, +5V
YES
Color normal?
YES
Each connector?
YES
END
LGE Internal Use Only
NO
Main B/D Check
NO
NO
Power source, D16, D17, D18, D19
Check and Replace
NO
Check RGB AMP circuit
(Q29, Q30, Q31) and Replace
NO
Replace and Reassemble
NO
3-4 Copyright © 2008 LG Electronics. Inc. All right reserved.
Replace
Replace
Only for training and service purposes