Troubleshooting - Samsung PS42P2SBX/XEC Service Manual

6. Troubleshooting

6-1 Entirely no screen
Remove SMPS output connector
(connect Video B d only)
Power on
SMPS Output
Voltage
Logic Connect Power
LED Light-on
(Power, Sink)
X-B d Connect Power
X-B d Output
Y-B d Connect Power
Y-B d Output
Replace Panel
Samsung Electronics
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Normal
5V Output
Abnormal
Normal
AC Input
Normal
Replace SMPS
Replace Logic B d
Replace X-B d
Replace Y-B d
Troubleshooting
Replace Video B d
Change Fuse
6-1