Acer AL732 Service Manual page 17

No display
(White)
Check the main
board ?
5V
YES
+3.3V ?
YES
Check the main
board ?
U4/Pin32
YES
H/V Input
Signal ?
NO
Check
H/V Signal
Display ?
YES
OK !
Check
NO
U13,U12,R83
NO
Check
U14
NO
Check
3.3V Circuit
YES
Change
U4
Check
YES
CN2
Change
NO
Signal Cable