Acer NA23WABAS Service Manual page 33

32
ACER V233H
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5.5 Abnormal screen for DVI (This page for 1A1D used)
5. Troubleshooting (continued)
Check the DVI video signal from computer input
on P303 of DVI connector.
NG
OK
Check the DVI input video signals on I307 pin
4,5,7,8,10,11,13,14 respectively that differential
input voltage is 150 to 1200mV, and input
commond mode voltage is 3.3V.
NG
OK
Check all LVDS signals being output to P304
from I307?
NG
OK
Proceed "Checking the resolution change IC
movement" section.
Failure Point
1) No DVI video signals output from host
computer, check computer.
2) DVI Video signal cable disconnection.
Failure Point
In the case of the DVI_RX0+/- signal. (A
DVI_RX1+/-, DVI_RX2+/- and DVI_RXC+/-
signal is the same path, too.)
1)Printed wire broke between P303 pin 17, 18 and
I307 pin 11. 10.
2) Video cable is failure.
3) R386, R387 open.
Failure Point
Printed wire broke between I307 and P304.