Acer P203 P203W LCD Service Guide - Page 29

28 ACER P203W Go to cover page 5. Troubleshooting (continued) 5.8 Abnormal plug and play operation (For the DVI) Confirm the host computer supplies DDC2 mode. NG OK Failure Point The host machine is not communicatiog in DDC2 mode. Check the voltage on P303 pin14 that is power DC 5 V. NG OK Check the voltage on P303 pin 16 that is 4.5V. NG OK Check the voltage on I304 pin8 that is power DC 5 V. OK NG Check the voltage on P303 pin 6, pin7 that is serial data / clock signal. NG OK Check the output signal of serial data/clock on I304 pin 5, pin6. NG OK Failure Point 1) Printed wire broke between I305 pin 1, pin100, I304 pin 5, 6 and P303 pin 7, 6. 2) I305 maybe failure. 3) R347, R349 is open. 4) R345 or R346 or C344 or C346 is short. Failure Point The Video cable is failure. Failure Point 1) Printed wire broke between P303 pin14 and pin16. 2) R338 is open. 3) C340 or C341 is short. Failure Point 1) Printed wire broke between I304 pin8, D321 and P303 pin 14. 2) D321 is failure. 3) D322 is short. Failure Point The Video cable is failure. Failure Point I304 is failure.