5.Troubleshooting (continued)
5.6 Abnormal Plug and Play Operation
5.6.1Abnormal DDC2 (D-SUB)
5.6.2Abnormal DDC2 (DVI)
Confirmt heout put of serial
data on I312 pin6 synchronize SCLK at
TTLl evel
OK
FailurePoint
I312 is defectedNG
FailurePoint
1. The host machine isn’t communicating i n DDC2mode.
2. The video cable may have defected or may not be establi shed
connection for DDC.
3. The I312 pin6 and P304 pin15 may have no signal or incor rect.
4. The R374, R377 is open.
5. I312 pin6 is short.
6. The input source cable is defected.
7. CheckI 312pi n5si gnal whether if correct.
Confirmt heout put of serial
dataon I 313 pin6 synchronize SCLK at
TTLl evel
OK
FailurePoint
I313 is defectedNG
FailurePoint
1. The host machine isn’t communicating i n DDC2mode.
2. The video cable may have defected or may not be establi shed
connection for DDC.
3. The I313 pin6 and P305 pin6 may have no signal or incor rect.
4. The R393 or R397i s open.
5. I313 pin6 is short.
6. The input source cable is defected .
7. CheckI 313pi n5si gnal whether if correct.
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