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I was playing a game 'Sniper Elite v2' on my system, when all of a sudden the computer froze up and started hearing a repeated noise (reloading the gun over and over again). I couldn't get any of the default escapes to work (Ctrl+Alt+Del, Ctrl+Esc, Windows key). So I restarted the computer via the button. This time the computer didn't start up.

I just got the

No Input Signal

displayed on my monitor and it switched to Analog mode.

Couple of hours later, I tried to switch it on and this time it started. I saw the initial screen (the black one that displays the system configurations) and then the next one (the one that displays the motherboard/chipset name or something.. it has a blueish color to it) and then the prompt for accessing the bios came and the system froze up again.

Ever since then the system has only shown the "No Input Signal" on the monitor and then it switches to Analog mode.

My system configurations are:

  • Win 7 Ultimate
  • nVidia GeForce 8500 graphics card
  • 2 GB RAM
  • 160 GB hard disk (internal)
  • An external 1 TB hard disk (powered)
  • ViewSonic Monitor

Any other specs required?

So what maybe the problem? Faulty monitor cable or something? Loose connection? Or it is something more serious?

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There was a blue tint? I'm inclined to think your video card is failing/has failed. Do you have a spare one you can swap in to test? –  Bob May 21 '12 at 5:09
    
How is it first switching to digital and getting the no-signal error? Does this happen spontaneously when you turn on the PC or are you manually switching it to digital? –  Paul May 21 '12 at 5:15
    
@Bob No I don't have a spare one to test on :( –  Shyam K May 21 '12 at 5:29
    
@Paul It shows the No Input Signal thing and then show Analog and then finally goes to sleep (green light of the monitor goes orange) –  Shyam K May 21 '12 at 5:30
    
Does your computer have integrated graphics? If yes, try that. –  Bob May 21 '12 at 5:42
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