Question about ViewSonic VP930b 19" LCD Monitor

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My VP930B monitor screen is so distorted that you can barely see what is there. Once in a great while the picture will suddenly be perfect! The monitor and tower both have a DVI-i dual connectors , but my cable has DVI-D singlelink. Could this be the problem? Linda

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Could be. You can try using the VGA port just for a test. Connect it to a friends computer or a laptop. also, there is the following solution for unusual problems on the VP930B:

It is caused by bad capacitors in the power supply circuit.

Open the monitor, and look at the power board. There are six capacitors. Replace the 220uF @ 25V and the 1000uF @ 16V capacitors. I would recommend replacing them with 35V and 25V capacitors respectively.

If the serial number on your monitor starts with Q8H you could also have a bad IC on the main board. Q8 on the main board is an FET in an IC package. If this problem persists solder a wire from the right side to the left side. There is one pin that turns the IC on and off. All the other pins (per side) are soldered together. Do not solder the pin on the left side that is by itself. Just leave it. Solder ALL the other pins on the left to ALL the other pins on the right.

Remember, do this ONLY if the problem persists after replacing the capacitors AND if your serial number starts with Q8H.

Posted on Sep 15, 2009

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