Bad Screen - Acer B223W Service Manual

Acer

4.Bad Screen

Black screen
Check p ower
supply:pin 1,2 of
CN10 1
Y ES
Check pow er su pply
for U1 04
Y ES
Ch eck reset (pin1 08)
of U1 04
Y ES
Check cry stal (pin
127 ,128) waveform of
U10 5
Y ES
Check CCF L-
Enable,Brightness(pin
109 ,125)
of U1 04
NG
U104 FA IL
NG
NG
N G
NG
YES
Check pin5,6 of
CN10 1
N G
22
Acer –LCD-B223W
Pow er fail
Check F B102 ,FB10 3,
Ch eck C15 1,R165
Check
X101 ,C150,C 152
YES
In verter Fail
Check R1 11,Q 106,
R1 12,R14 7,R148