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My hp vs15 lcd monitor goes black 3-5 seconds after power up... i can still barely see the desktop. should i bother with replacing the backlight and or inverter or just go with a new monitor? i'm fairly good with electronics.

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It does sound like a back light issue. Not under warranty?

The fact that it does light up suggests it may be a heat induced fault? May be just a simple dry solder joint. Although you cannot rule out the CCFL (Cold Cathode fluorescent lamps) being faulty either. A quick check with a meter may tell you if it is the light source or the driver cct that is at fault.

If its the lamps, salvaging some from another LCD may be a good cheap altenative.

Usually there is a simple fault (failed FET/Transistor) causing these problems so if you are good with a soldering iron and can work thru the cct to locate the offending FET/transistor it will be a relatively cheap and easy fix.

Posted on Jul 02, 2008

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my problem was fixed by viziks from FixYa dated Sep 12
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Monitor going black after a few seconds can be causd by a faulty power supply or inverter. Some monitors have both as one unit.
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The average monitor from 17 to 20 and sometimes the 22s have usually 4 bulbs in them. One bad bulb will also cause the inverter to not fire up.
Bad bulbs usually show pinkish tint, or flickering or are dark at center top or bottom of the display.
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Monitor is dead. The LCD inverter board probably went out and needs replacing. More than likely, it will cost you over $100 to get it fixed. It's better to spend the money on a new monitor.

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