Sharp LC-60LE452U Service Manual page 25

5.4.3 Function Troubleshooting（PC problem）
Debug the input
PC lose colour
OK
Check RGB
circuit
NG
Repair
OK
RGB
Circuit
ADC adjustment
OK
Change U3
Sharp LC-60LE450U/LC-60LE452U Service manual
NG
Check the input machine
signal
Check PC input cable
Picture not in
center
OK
PC picture not in
center
OK
ADC adjustment
PC problem
OK
OK
NG
OK
PC picture
flicker
OK
Check the PC
synchronizing
signal
OK
ADC Adjustment
25
Change PC input cable
No signal
OK
Check the PC
NG
synchronizing
signal
Repair the PC
OK
synchronizing
signal circuit
Change U3
NG
Repair the PC
synchronizing
signal circuit