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Remove the System's RAM or Memory and try to clean the copper connector with an eraser, put it back and try to turn on the system if its still doesn't work remove any video enhancing device and connect your video output the the built-it video card, if still dont work, try a different video card on the system, if still dont work check the monitor for any further problems
you forgot to say, screen dark? and power light off. does the OSD work? Push button that pops up the OSD screen for bightness, does that work> \can be one of 4 things. 100 % dead. try it on another PC> bad power cord bad video cable. bad LCD bad PC, bad Video card in PC or some game using an illegal video card mode. try another PC and see if the LCD works there. easy huh?
Most likely a bad video card, or bad memory..If you have two sticks of memory inside remove one and start it up...do this with both if it doesnt work..then try a new video card.
Possible bad modem and or i would remove any and all current Anti Virus spyware progs and install Kaspersky Internet Security 2009 free download also Malwarebytes from Malwarebytes.Org. Do a full scan w/ both of these programs!
Don't always go by what diagnostics tell you because all it basically checks for is to see if it recognizes the devices. My advice would be to hook up a different known good working monitor to the computer and see if still goes dim on you.
If a different monitor is going dim on you intermittenly then you know for sure at that point its not the monitor and it would have to be the video card.
Try that and let me know how that goes. Keep in mind that video cards sometimes go bad and they go bad by overheating.
Monitors can go bad cause of bad capacitors which is why im suggesting don't always go by what the computer is telling you.
Liviman,
I would first think that this is a monitor problem.You didnt say if it is a CRT or LCD monitor. Check the pins on both ends of the cable.
If it is a CRT monitor I would say the red electron gun went bad.
If you can take the Video card and try it in another computer to make sure that it is bad.
Keep us posted,
thanks
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