Acer X193 X183H / X193HQ Service Guide - Page 24

5.4 Abnormal screen for VGA 5. Troubleshooting (continued) ACER X193HQ 23 Go to cover page 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 pin12, 14, 16 respectively that their level is 0.0 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 pin1 and I305 pin16. 2) Video cable is failure. 3) FB302,FB306,R327 is open. 4) R326 is short or open. 5) C315 is short or open. NG OK Failure Point Printed wire broke between I305 and P305. Prpcess "Checking the resolution change IC movement" section.