No Display; Can’t Start - LG 26LG3000 Service Manual

2. No Display

Check the source
Check LVDS cable
Check 12V power supply
Check main board power
Check I
3. Can't start (LED indicator Blank)
Check keyboard
Check I
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Only for training and service purposes
No display
NG
OK
NG
OK
OK
OK
NG
Check U404
OK
2
C communication
OK
NG
Check panel
Can't start
OK
Check 5V_SB
OK
2
C communication
OK
Check oscillistor
Reset source
Replace LVDS cable
NG
Return to "1"
Replace U404
NG
2
Repair I C communication relative circuit
Replace panel
NG
Repair the keyboard
NG
Check every chip power supply
NG
Replace I
NG
Replace oscillistor
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2
C communication component
LGE Internal Use Only