
Abnormal Screen: Abnormal screen for DVI-D source
Check the TMDS signal from computer input
P303 of DVI-D video connector
Failure Point:
1. No TMDS signals output from host computer. Check the computer.
2. DVI-D video signal cable is disconnected.
Check the TMDS input video signals on
I306 pin72, pin73, pin75, pin76, pin80, pin81, pin83,
pin84 respectively that their differential input voltage
is 150mV to 1200mV
NG
OK
Failure Point:
In the case of the RX2+ signal (A RX1, 0, and RXC signal is same path, too)
1. DVI-D video cable is failure.
2. R332~R335, R338~R341 may be open.
3. I306 is damaged.
NG
OK
Check all LVDS signals supplied to
P306 from I306
NG
Proceed ‘Checking the resolution changed IC movement’
section
OK
Failure Point:
Printed wire is open between I306 and P306.
Appendix 4: Troubleshooting
7
Go to cover page
ACER AL2002W