LG DP270B Service Manual page 13

LCD ELECTRICAL TROUBLESHOOTING GUIDE
LCD MODE CONT signal?
All "LOW" (Normal condition?
YES
TFT LCD pressure voltage?
+15V, -14V, +5V
YES
TFT LCD normal?
YES
Color adjusting normal?
YES
Each connector?
YES
END
NO
MAIN B/D Check
NO
Power source and D901, D902, U901 Check
NO
Readjust as adjustement standard
NO
Replace and Reassemble
NO
3-4
Replace
Replace