Power Key Operation - LG HB954TB Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. POWER KEY OPERATION

POWER cord insert
Stand by LED
turn ON?
YES
When you press
power key, "WELCOME"
display OK?
YES
Power key OK
NO
CN3C1 cable
connection OK?
CN3C1 pin1
power OK?
Replace LED(LD3C1)
NO
FRONT Block check
2-32
NO
YES
NO
YES
3p Harness cable connect
MAIN & SMPS Block check