Acer AL2002 AL2002 Service Guide - Page 46

10 ACER AL2002W Go to cover page Appendix 4: Troubleshooting Abnormal plug and play operation for DVI - D Confirm the host computer supplies DDC2 mode. NG Failure Point: The host computer is not communicating in DDC2 mode. OK Check the voltage on P303 pin14 that is power DC 5V. NG Failure Point: The DVI-D video cable is failure. OK Check the voltage on I305 pin8 OK 1. Check the voltage on P301 or P302 pin6 and pin7 that is serial data and clock signal. 2. Check I301 and I302 pin10 is high. OK Failure Point: 1. Printed wire broke between I305 pin5, pin6 and P302 pin6, pin7. 2. R346 or R347 is open. 4. C346 or C347 is short. 5. D323 , D322 is short. Failure Point: 1. Printed wire is broken between I305 pin8 and P303 NG pin14. 2. D320 D321 is damaged 3. C345 is short Failure Point: NG The DVI-D video cable is failure. I305 pin5, pin6 is low , the I305 may be defected.