Acer NA23WABAS Service Manual page 45

44
ACER V233H
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5.5 Abnormal screen (For DVI and the same for HDMI)
5. Troubleshooting (continued)
Check the DVI video signal from computer input
on P304 of DVI connector.
NG
OK
Check the DVI input video signals on I312 pin
4,5,9,10,14,15,19,20 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 P305
from I312?
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 P304 pin 17, 18 and
I312 pin 4. 15.
2) Video cable is failure.
3) R361, R362 open.
Failure Point
Printed wire broke between I312 and P305.