Question about HP vs17c 17" LCD Monitor

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Hewlett-Packard vs17 half fixed, what to do next?

I am attempting to repair a Hewlett-Packard vs17 LCD monitor. When I initially examined the inverter circuit board it was evident that 4 electrolytic capacitors had failed. They were replaced and the monitor went from having a blinking blue power button and showing absolutely nothing to a state where the power button remained on without flashing and the expected images were displayed on the screen for about a second before fading to black. I again the removed the inverter board . Upon close inspection, components of the circuit board show no obvious damage. There are no areas of darkening on the board. There are no hints of thermal damage whatsoever. I understand that cold solder joints may present problems and I inspected the board as closely as I can and have not found any. If this were a Benq inverter board I would know which joints were most likely to be problematic but for this board I have no idea. Without some evident sign of damage I am unsure of how to proceed. One additional piece of information that may or may not be of any importance is this fact: the monitor in question had been running for several years without being turned off. There was no problem with picture quality or brightness. Only after being turned off and attempting to restart it did the monitor display no picture and a flashing power button. Can anybody suggest what steps to take next?

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Hello,

I have also seen this type of problem. Have you checked the large caps on the inverter board, no just the power supply board? Many LCD monitors have 2 caps on the inverter and I have had to replace them from time to time. The next thing to check would be the driver transistors. I hope this helps.

Buddy

Posted on Jun 23, 2009

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