5. Troubleshooting (continued)
5.1.6.2 Abnormal plug and play operation for DVI
OK
NG
Failure Point
The host machine is not communicated in DDC/
CI mode.
OK
NG
Failure Point
1) Printed wire broke between I305 pin 8, D311
and CN303 pin 14.
2) D311 is failure.
OK
NG
Failure Point
I305 is failure.
OK
NG
Failure Point
The DVI video cable is failure.
OK
NG
Failure Point
The DVI video cable is failure.
Failure Point
1) Printed wire broke between I310 pin 123,
124, I305 pin 5, 6 and CN303 pin 7, 6.
2) I310 maybe failure.
3) R339 or R340 is open.
4) C338, C339, R337, R338 is short.
Confirm the host computer supplies
DDC/CI mode.
Check the voltage on CN303 pin 14,
that is DC 5 V.
Check the voltage on I305 pin 8,
that is DC 5 V.
Check the signals if is high
level on CN303 pin 7, 6, that is I2C data
/ clk signal.
Check the output signal of I2C
data / clk on I305 pin 5, 6.
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ACER A211H/A221HQ