Acer P243W

5. Troubleshooting (continued)
5.6 Abnormal Plug and Play Operation
5.6.1 Abnormal DDC2 (D-SUB)
5.6.2 Abnormal DDC2 (DVI)
Confirm the output of serial
data on I312 pin6 synchronize SCLK at
TTL level
OK
F ailure Point
I312 is defectedNG
F ailure Point
1. The host machine isn’t comm unicating in DD C2 m ode.
2. The video cable may have defected or may not be established
connection for DDC.
3. The I312 pin6 and P304 pin15 m ay have no signal or incorrect.
4. The R374, R377 is open.
5. I312 pin6 is short.
6. The input source cable is defected.
7. Check I312 pin5 signal whether if correct.
Confirm the output of serial
data on I313 pin6 synchronize SCLK at
TTL level
OK
F ailure P oint
I313 is defectedNG
F ailure P oint
1. The host machine isn’t comm unicating in DD C2 m ode.
2. The video cable may have defected or may not be established
connection for DDC .
3. The I313 pin6 and P305 pin6 may have no signal or incorrect.
4. The R393 or R 397 is open.
5. I313 pin6 is short.
6. The input source cable is defected.
7. Check I313 pin5 signal whether if correct.
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ACER P243W