5. Troubleshooting (continued)
5.4 Abnormal screen for VGA
ACER H233H |
| 27 |
Go to cover page
Check the R, G, B video signal from computer
input on P302 of
NG
OK
Check the R, G, B input video signals on I308 pin25, 27, 30 respectively that their level is 0.0 to
Failure Point
1)No R, G, B video signals output from host computer, check computer.
2)Video signal cable disconnection.
NG
OK
Check all LVDS signals being output to P307
from I308?
NG
OK
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 I308 pin30.
2)Video cable is failure.
3)FB315,FB306,R327,C315 is open.
4)R326,C329 is short or open.
Failure Point
Printed wire broke between I308 and P307.
Proceed "Checking the resolution change IC
movement" section.