Question about BenQ FP731 17" LCD Monitor

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Can't find video signal

On power up, Power LED lights green, "BENQ" is displayed for >2s. After 4s message displays "Signal Cable Not Connected" for >250ms, screen goes blank and Power LED lights amber. All Buttons on Monitor non functioning except power off. Cycle power button and cycle repeats.
I have resoldered Transformers T751, T752, T753, T754 and Transistors Q739, Q740, Q743, Q751, Q759, Q760.
Can you help any further.

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If screen says "Signal cable not connected " all the time till power led switches to Amber chances are monitor is ok and problem is with graphic card or cpu.Connect to Known working CPU and confirm that monitor is the problem.
If same problem persists on another working cpu after changing signal cable,the interface board in the monitor could be defective.
Samir

PLease rate solution and provide feedback.

Posted on Jun 12, 2008

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