Checkthe R, G, B video signal from computer
inputon P302 of D-sub connector.
OK
NG FailurePoint
1)No R, G, B video signals output from host
computer,check computer.
2)Video signal cable disconnection.
Checkthe R, G, B input video signals on I308
pin25,27, 30 respectively that their level is 0.0 to
0.7Vp-p.
FailurePoint
Inthe case of the Red signal. (A Green and Blue
signalis the same path, too.)
1)Printed wire broke between P302 pin1 and
I308pin30.
2)Video cable is failure.
3)FB315,FB306,R327,C315 isopen.
4)R326,C329 is short or open.
NG
OK
Checkall LVDS signals beingoutput to P307
fromI308?
FailurePoint
Printedwire broke between I308 and P307.
NG
OK
Proceed"Checking the resolution change IC
movement"section.
5.4Abnormal screen for VGA27
Go to cover page
5.Troubleshooting (continued)
ACERH233H