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Descktop computer turns on, but no video

Hi, I have a desktop computer that went dead recently. I will describe a series of events that lead to that. I had a video card that went bad. I had it replaced. But that did not resolve my problem. I narrowed it down to the power supply. I replaced it and now it looks/sounds like it turns on, the usual start up sounds, but the monitor remains black and it never goes further than that. Somebody told me that I need to reset the bios so that it uses the integrated video rather than the graphics card. I dont know where to begin. Does anybody have any idea what else it could be wrong ? Any help is appreciated. Thanks

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  • Heather May 28, 2008

    I dropped my tower and the heatsink/fan came off of the CPU, making my computer come on for 5-10 seconds and then shut off. I cleaned the CPU and heatsink and then reapplied artic silver. (CPU never became unseated although I removed, cleaned and checked prongs - all good)



    Now my computer boots up, and sounds like normal - however, I'm getting no video whatsoever. I've tried disconnecting everything and adding each back in one at a time. I even took the battery out, cleared CMOS but still the same black screen. I tried connecting the screen to the on board video rather than my card and no luck.



    Any ideas? Prior to cleaning and reapply the artic silver - when my computer was turning on for those few seconds before shutting down automatically - the video was working fine. What the heck?

  • cpoluk Jan 30, 2009

    I am having the same problem. Powers up but no video or beeps. I went through this entire process and still am receiving no video or beeps. So likely the problem is the MB needs replacement?

    I am repairing this system for a friend. She said it worked fine, but when they moved it quit working.

  • cpoluk Jan 30, 2009

    I have a computer has same problem. Powers on, but no video. I did the entire process you suggested and still get no beeps at all. So I'm guessing motherboard?? Lady I'm fixing it for said it worked fine until she moved then it started having this problem.

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Hi, I'm assuming your motherboard has a built-in video card. Let's trying doing it by the numbers. 1. Remove all memories, cards, FDD, IDE or SATA cables from the motherboard. What should be left are only the power supply connector, the CPU + Heatsink & fan; 2. With the unit off & unplugged, pry/remove the 3V memory battery. Short the CMOS reset jumper. This is normally located very near the battery. If you can post brand/model of MB, we can probably point the exact location or you can go to the manufacturer's website and download the pdf file of the manual; 3. Leave it with no battery and the CMOS reset (not default) jumper in place. Give it a couple of minutes; 4. Re-insert the battery and remove the jumper from reset position and replace it back to default position (its original position); 5. Connect keyboard, power cord, monitor video cable (onboard video connector is below the printer port and beside the serial COM1 port) and; 6. Power up. Most cases you will have a series or combinations of beeps since there is no memory (and no video since the onboard video uses shared memory). Sometimes no beeps at all. Power off; 7. Install a single stick of memory. It would be a good idea to clean the edges/connector pins of the memory stick with the use of a pencil eraser. Further use a clean/new paintbruh to remove any other dirt. Use the same brush on the slot where the memory is to be placed. Seat the memory into one of the memory slots. Power up, there should now be a healthy pre-post beep (if you do not have an onboard video, a long beep will tell you that no video card present). If no beeps nor display in your monitor, power off, remove the memory and place it in the other memory slot and try again. If still a no go, try with another memory following the same sequence. 8. If still a no go, try with your videocard either in AGP or PCI-E slot as applicable; 9. If it works, you're set to re-install everything else; 10. If not, your motherboard and/or processor has to be replaced. Hope this works out for you. Good luck and pls post again how things turn up. Kind regards.

Posted on Aug 05, 2007

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From the symptom, it could be the main mother board faulty. the cost of mother board is about the same as the video card.hope it would help.

Posted on Aug 05, 2007

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