Acer RA19WAANU Service Manual download pdf (Page 24)

5. Troubleshooting (continued)

5.4 Abnormal screen for VGA

Check the R, G, B video signal from computer

input on P302 of video connector.

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.

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.

Check all LVDS signals being output to P305

from I305?

Failure Point

Printed wire broke between I305 and P305.

Prpcess "Checking the resolution change IC

movement" section.

Go to cover page

ACER X193HQ

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 35 36

No comments

Acer RA19WAANU Service Manual Page 24