LG 20LV1R.AUSBZA, Service Manual

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2. No Display (LED indicator green)
3. Can
’
t start (LED indicator yellow)
Check the source
OK
Reset source
NG
Check LVDS cable
NG
Replace LVDS cable
OK
Check 12V power supply
NG
Return to “1”
OK
OK
Check U406
NG
Replace U406
OK
OK
Check panel
NG
Replace panel
Check main board power
Check I
2
C communication
Repair I
2
C communication relative circuit
NG
No display
NG
Repair the keyboard
OK
Check 5V_SB
NG
Check every chip power supply
OK
NG
Check I
2
C communication
OK
Check keyboard
Replace I2C communication component
Check oscillistor
NG
Replace oscillistor
Can’t start