4.6 Abnormal plug and play operation
Confirm the host computer supplies DDC/CI mode.
OK
NG
Failure Point
The host machine is not communicated in DDC/CI
mode.
Check the voltage on I304 pin 8 that is DC 5 V.
OK
NG
Failure Point
1) Printed wire broke between I304 pinv8, D307 and
P302 pin 9.
2) D307 is failure.
Check the output signal of I2C data / clk on I304 pin 5,
6.
OK
NG
Failure Point
I304 is failure.
Check the voltage on P302 pin 9 that is DC 5 V.
OK
NG
Failure Point
TheVGAvideocableisfailure.
Check the signals if is high level on P302 pin 12, 15
that is I2C data / clk signal.
OK
NG
Failure Point
TheVGAvideocableisfailure.
Failure Point
1) Printed wire broke between I306 pin 65, 64, I304 pin
5, 6 and P302 pin 12, 15.
2) I306 maybe failure.
3) R328, R329 is open.
4) C331, C332, R326, R327 is short.
4.6.1 Abnormal plug and play operation for VGA
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