RCA L15D20 Service Manual page 22

19'' LCD TV Color Monitor
3. No display (LED indicator green)
Check the source
OK
Check LVDS cable
OK
Check 12V power supply
OK
Check LIGHT-ON-OUT signal
OK
Check IC901
OK
Check Q805, Q806
OK
Check PT801, PT802
OK
Check U401
OK
Check panel
NG
Reset source
NG
Reset LVDS cable
NG
Return to "1"
NG
Replace Q801
NG
Replace IC901
NG
Replace Q805, Q806
NG
Replace PT801, PT802
NG
Replace U401
NG
Replace panel
22
RCA L19WD20