Electrical Troubleshooting Guide; Power(Smps) Circuit - LG LRM-519 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER(SMPS) CIRCUIT

Power cable
connection
YES
NO
"HELLO" display
on VFD OK
YES
NO
"LG logo" display
on Monitor OK
YES
NO
"CH No. & DATE"
display on VFD OK
NO
Audio OK
YES
NO
Video OK
YES
Normal TV
Function OK
NO
Front Signal Cable
Connection OK
YES
NO
Front Power Cable
Connection OK
YES
NO
Display Cable
Connection OK
YES
NO
Display Port
Selection (S800) OK
YES
HDD Image
upgrade
NO
Audio Cable
Connection OK
YES
Video Input Cable
connection OK
3-2
Front signal cable
connect
Front power cable
connect
Display Cable
Connect
Proper display port
select
Audio Cable
Connect