Black Screen - Acer AL2017 Service Manual

Acer

3.Black screen

B lack screen
C heck pow er
supply:pin 1,2 of
C N 101
Y E S
C heck pow er supply
for U 105
Y E S
C heck reset (pin84) of
U 105
Y E S
C heck crystal (pin 96,97)
w aveform of U 105
Y E S
C heck C C FL -
E nable(pin 85)
of U 105
N G
U 105 FA IL
N G
N G
N G
N G
Y E S
C heck pin4 of
C N 101
N G
C heck FB 102,FB 103,
C heck C 144,R 172
Y E S
C heck R 167,Q 106,
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Service Manual
Pow er fail
FB 105,FB 106
C heck
X 101,C 153,C 154
Inverter Fail
R 108,R 110