Al2016W Backlight Can't Be Turned On(Inl Inverter) - Acer AL2016 Service Manual

Acer

5. AL2016W backlight can't be turned on(INL inverter)

N o R aster
Y e s
LED G r e e n?
Y e s
I s the r e 14V volta ge on
pin13 of I C 501?
Y e s
C he c k C N 501~ C N 504 a r e
O K
Y e s
C he c k I C 501- pin8 volta ge
is H igh- le ve l volta ge
Y e s
C he c k I C 501- pin7 volta ge
is P W M pulse w a ve
Y e s
C he c k I C 501- pin12
volta ge is 5.0V
Y e s
C he c k U 501, U 502, U 503,
U 504 a r e O K
Y e s
C he c k pr ote c tion c ir c uit
Q 501, Q 502 a r e ok
Y e s
EN D
N O C he c k pow e r boa r d
N O F 501 ope n
R e sta r t c onne c t the
N O
la m p w ir e
C he c k R 509, R 511, C 519
N O
a r e ok
C he c k R 501, R 508 a nd
N O
C 515 a r e ok
I C 501 f a il, c ha nge
N O
I C 501
C ha nge U 501, U 502,
N O
U 503, U 504
N O C ha nge Q 501, Q 502
24
C ha nge R 509, R 511,
N O
Y e s C he c k I /F boa r d
C ha nge R 501, R 508,
N O
Y e s C he c k I /F boa r d
Service Manual
C 519
C 515