Confirmthe host computersupplies DDC2B mode.
OK
NG
FailurePoint
Thehost machine is not communicatiog in DDC2B
mode.
OK
Checkthe output signal of serial data / clock on I308
pin122,121
OK
NG FailurePoint
I308is failure.
Checkthe voltage on P303 pin14 that is power DC 5 V.
OK
NG FailurePoint
TheVideo cable is failure.
Checkthe voltage onP303 pin7, 6 thatis serial data /
clocksignal.
OK
NG FailurePoint
TheVideo cable is failure.
FailurePoint
1)Printed wire broke between I308 pin121,122,
,R410,R414, R344, R345 and P303 pin7,6
2)I308 maybe failure.
3)R338, R339 is open.
4)D320 or D321 or C339 or C342 is shorted.
Checkthe voltage onP303 pin16 that is 4.5V.
NG
FailurePoint
1)Printed wire broke between P303 pin 14 and pin 16.
5.8Abnormal plug and play operation (For DVI and the same for HDMI)31
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5.Troubleshooting (continued)
ACERH233H