No Raster - Acer X163W Service Manual

Acer

3. No Raster

No raster?
LED Blue?
Backlight can't
be turned on.
Is there 14Vdc
voltage on pin9 of
IC501?
Is there high-level
voltage on pin8 of
IC501?
Are connected rightly
CN501, CN502?
Is there instantaneously pulse
wave on pin14, pin11 of
IC501 at the moment of
restart?
Is T501 ok?
Check feedback circuit
D507,D508.
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
No
Yes
Check power supply
Is Ok R503?
No
No
No
Is Ok IC501?
No
37
Acer –LCD-X163W
Yes
Check I/F board
R503 open
Connecting the
output connector
again
Yes
U501 fail
IC501 fail
T501 fail
END