Acer P203 Service Manual page 29

ACER P203W
28
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5.8 Abnormal plug and play operation (For the DVI)
5. Troubleshooting (continued)
Confirm the host computer
supplies DDC2 mode.
OK
Check the voltage on P303
pin14 that is power DC 5 V.
OK
Check the voltage on P303
pin 16 that is 4.5V.
OK
Check the voltage on I304
pin8 that is power DC 5 V.
OK
Check the voltage on P303
pin 6, pin7 that is serial data
/ clock signal.
OK
Check the output signal of
serial data/clock on I304
pin 5, pin6.
OK
Failure Point
1) Printed wire broke between I305 pin 1,
pin100, I304 pin 5, 6 and P303 pin 7, 6.
2) I305 maybe failure.
3) R347, R349 is open.
4) R345 or R346 or C344 or C346 is short.
Failure Point
NG
The host machine is not communicatiog in
DDC2 mode.
NG
Failure Point
The Video cable is failure.
Failure Point
NG
1) Printed wire broke between P303 pin14 and
pin16.
2) R338 is open.
3) C340 or C341 is short.
Failure Point
NG 1) Printed wire broke between I304 pin8, D321
and P303 pin 14.
2) D321 is failure.
3) D322 is short.
NG
Failure Point
The Video cable is failure.
NG Failure Point
I304 is failure.