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computer runs but black screen

Discussion in 'Hardware' started by egokillar, Jun 4, 2010.

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  1. egokillar

    egokillar Thread Starter

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    when i turn the power switch on the lights come on on the motherboard. the computer will start, harddisk runs and fans are spinning. i dont have a speaker for beep noises. screen is just blank, no signal. tried setting the graphics card in another computer where it runs fine. tried 2 different harddisks, tried powering up without harddisks, tried reseating components and removing ram sticks to check. nothing works. i can afford a new mobo or cpu, but how do i know which of them is faulty? i suspect the motherboard. also tried setting the graphics card in another slot, no luck. normally on my other computer when i turn it on, the graphic card fan will run hard for a few secs then settle once entering bios or post or what it is u call it, when setting it in the bad computer it just runs hard until i shut it off again. any help is greatly appreciated. thanks.
     
  2. egokillar

    egokillar Thread Starter

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  3. Triple6

    Triple6 Moderator

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    Could be a faulty power supply, try another power supply from another computer if you can.

    P.S. Please wait more then an hour and half before bumping up your thread.
     
  4. egokillar

    egokillar Thread Starter

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    tried another psu with no problems. would be a bummer to order a new mobo and find out its the cpu thats gone bad. how do i find out which is the faulty component of the 2? i dont have another cpu to test with with nor mobo. cheers.
     
  5. Triple6

    Triple6 Moderator

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    You could always take it into a local shop and have them test/swap parts. Cheaper then buying the wrong part. That said CPU's rarely fail, motherboards fail more often.
     
  6. dustyjay

    dustyjay

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    Please post your system specs, To include Make and model System if Big Box, or same info for the following if custom or home built, Mother Board (including Revision number), Processor (Exact Model Number), Ram, Video Card, Hdd(s), Optical Drive(s), Power Supply Manufacturer Model, Wattage and Amperage on the +12V Rails, OS, and any other peripherals installed on the motherboard.

    How are you determining that the hard drive is running? Do you see normal activity on the HDD Activity light or actually feel the Hdd running?
     
  7. egokillar

    egokillar Thread Starter

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    windows xp, asus crosshair nforce 590, sparkle 8800gt, ocz 600w, amd athlon 64 x2 3000+, 4 gb kingston ram. i can feel the hdd is running.
     
  8. Triple6

    Triple6 Moderator

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