Acer AL1702 AL1702 Service Guide - Page 18

4. Abnormal screen AL1702 Check the R, G, B video signal from computer input on P302 of video connector. NG OK Failure Point 1) No R, G, B video signals output from host computer, check computer. 2) Video signal cable disconnection. Check the R, G, B input video signals on I305 pin63, 60, 58 respectively that their level is 0.5 to 0.7Vp-p. NG OK Check all LVDS signals being output to P305 from I305? Failure Point In the case of the Red signal. (A Green and Blue signal is the same path, too.) 1)Printed wire broke between P302 pin 9 and I305 pin63. 2) Video cable is failure. 3) R322 is short or open. 4) R318 is short or open. 5) C332 is short or open. NG OK Failure Point Printed wire broke between I305 and P305. Prpcess "Checking the resolution change IC movement" section. Page 16