Acer AL1716 Manuel d'entretien - Page 19

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ACER AL1716W

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4.5 Abnormal screen for VGA source

Check the R.G.B video signals from

computer input on P302 of video connector

Check VGA R.G.B input

video signals on I306 pin99, pin96, pin93

respectively that their level is

0.5Vp-p to 0.7Vp-p

Check all LVDS signals being

output to P306 from I306?

Proceed 'Checking the resolution changed IC

movement' section

4. Troubleshooting (continued)

Failure Point:

1. No R.G.B video signals output from host computer. Check the computer.

2. VGA video signal cable disconnected

Failure Point:

In the case of the RED signal. (Green and Blue signals are the same path, too.)

1. Video cable is failure.

2. l306 is damaged.

3. FB305, FB307, FB309, FB308, FB306, FB310,

R310~R318, C317~C320, C324,C325 is Open

4. R313, R314, R315 is short.

Failure Point:

Printed wire is open between I306 and P306.