No Picture - Dell 2707WFP Service Manual

27" LCD Color Monitor
No picture (DVI / VGA)
Measure Q711 PIN 5/6/7/8=1.8V
X501 oscillate waveforms are normal?
Check the output wave of U401
Check if the sync signal from computer is output and
video cable is connected normally

No picture

U702 PIN 2=3.3V
U705 PIN 2=3.3V
Q708 S=1.8V
NG
OK
NG
OK
OK
NG
X401 oscillate waveforms are normal?
NG
OK
OK
NG
Replace U401
Replace Q711, U706, U702,
U705, Q708
Replace X501
Replace U501
Replace X401
Input the sync signal of computer,
or change the cable
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Dell 2707WFP