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Thread: Computer booting but no output

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    Computer booting but no output

    Whenever I try to boot my computer I'm getting no display output.
    On boot I get no beeps or annoying noises although my graphics card fan doesn't drop speed at all.

    This has completely happened out of the blue, I turned off my computer to connect power and my monitor to another one in the house so i could fix it.
    I literally shut it down, removed the power cable, removed my USB keyboard + mouse and disconnected my VGA cable.

    I'm thinking that this has something to do with my graphics card but I can't find anything wrong with i.

    Has anybody seen something like this before? Or should I just look at returning my graphics card?

    Thanks

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    The late but legendary peterb - Onward and Upward peterb's Avatar
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    Re: Computer booting but no output

    Is the monitor working with another computer?

    If so, can you try the graphics card in another machine - that will narrow it down to the GPU - or if you have anotherGPU, try that in the suspect machine.
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    Re: Computer booting but no output

    May sound silly - have you plugged your power back into your gpu?
    Terry

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    Re: Computer booting but no output

    reseat everything, failing that reset the bios

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    Re: Computer booting but no output

    Quote Originally Posted by GoNz0 View Post
    reseat everything, failing that reset the bios
    Powering down in normal operation is unlikely to affect the BIOS - which being EEPROM can't be 'reset', only reflashed - or the CMOS memory which just holds BIOS configuration information. As it is battery backed, it is unlikely to lose the config information, and if it did, there would still be a start up screen as the GPU would still operate in basic mode and the BIOS would start the BIOS setup menu.

    The symptoms point to GPU card failure - probably in the monitor drive circuitry, as the BIOS is not reporting any faults, but the only way to be certain is by substitution.
    Last edited by peterb; 21-09-2008 at 11:13 AM.
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    Re: Computer booting but no output

    You may have damaged a pin on the monitor lead. Can you retyry monitor on another PC to see if it works?

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    Re: Computer booting but no output

    Had something similar lately. Turned out my processor had died. I'd made no changes to it in it's 18 month operation and all the temperatures were fine (regularly checked via a couple of separate monitoring pieces of software).

    All the above advice is relevant but from experience it's not always the most obvious thing that's at fault. I'd start by clearing CMOS (jumpers or battery removal) and checking all the connections. Then check them again. If you still have the same symptoms (I did) then experiment to find out is working by swapping components with another machine. Also find out if the motherboard will give any of the POST error codes that it is supposed to (e.g. remove the RAM and you should get the beeps for no RAM detected).

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    Re: Computer booting but no output

    Firstly thanks for all the speedy replies.

    I've replaced my graphics card and am getting a picture displayed on my screen (at last!), so its my not monitor thats playing up.

    Going to try my old graphics card but I'll replace my DVI - DSUB converter to see if this makes any difference.

    UPDATE

    Still using a replacement card but I've noticed that when i reboot I need to clear the CMOS in order to get a display picture, anybody have any ideas?
    I'm pretty sure that this is now pointing towards a motherboard issue rather than a graphics card one.

    Cheers
    Last edited by Krakkenbus; 21-09-2008 at 05:28 PM.

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