With the computer on and the monitor connected, shine a flashlight at a slight angle on the screen and see if you can make out a picture. If you can, then it is most likely the ccfl inverter, if not possibly the power supply of the monitor.
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chanel_luv_u, Could be possible internal SMPS/CCFL inverter power supply problem. If the PC is ok with different "known-good" monitor connected to PC, then vs17 monitor will need some work done on it. Do some reading here first for some clues!!! http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flatpanel-disolay-blackout-solution/ The first place I would look at on ANY ccfl back-lit lcd monitor that starts doing "very strange things" would be the units "switch-mode-power-supply/CCFL inverter circuit". Try YOUTUBE for video clips of DIY lcd monitor repair to see if unit can be fixed for less than $6 in parts. Keep this in mind though, Your vs17 isn't any different than any other ccfl back-lit lcd monitor in it's basic design and operation. Do some reading of fixya LCD monitor technicians profiles for more info. Let us know what plans you have after you do your research. Bye for now. 12fixlouie
The symptoms you describe, pretty much diagnose a failed High Voltage power supply board problem in the monitor. This is usually cost prohibitive to repair, as LCD monitor prices have dropped a bit, so your monitor is beyond economical repair.
Have you tried connecting this monitor to another computer, even a laptop. This would tell you whether the display is bad or the video card is the culprit. I suspect the monitor's power supply is dying. Taking it to a pro for repair should cost @55.00. Buying a new monitor @ $100 - $125.