Copyright©2008 LG Electronics.Inc.All right reserved
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LGE Internal Use
Only
Only for training and service purposes
2.
2.
2.
2. No
No
No
No Display
Display
Display
Display
3.
3.
3.
3. Can
Can
Can
Can
’’’’
tttt start
start
start
start (LED
(LED
(LED
(LED indicator
indicator
indicator
indicator Blank
Blank
Blank
Blank))))
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 U404
NG
Replace U404
OK
OK
Check panel
NG
Replace panel
Check main board power
supply
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 I
2
C communication component
Check oscillistor
NG
Replace oscillistor
Can’t start
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