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R15AAC/AAU (vs15)
6.
Abnormal screen
6.1
Abnormal screen for VGA source
Check the R, G, B video signal from computer
input on P302 of video connector.
OK
NG
Failure Point
1) No R, G, B video signals output from host
computer, check computer.
2) VGA video signal cable disconnection.
Check the R, G, B input video signals on I307
pin93, 96, 99 respectively that their level is 0.5
to 0.7Vp-p.
Failure Point
In the case of the Red signal. (Green and Blue
signal is the same path, too.)
1) Printed wire broke between P303 pin 1 and
I307 pin99.
2) Video cable is failure.
3) FB308, FB309, R313 are open.
4) R318 is short.
5) C325 is short or open.
6) C329 is short.
NG
OK
Check all LVDS signals being output to P306
from I307?
Failure Point
1) Printed wire broke between I311 and P305.
2) LVDS cable failure.
NG
OK
Prpcess "Checking the resolution change IC
movement" section.
