Monitor not getting signal 9 times out of 10

Hi all,

Around 9 times out of 10 when I boot up my computer the monitor doesn't show anything, but the computer itself boots (I hear the Windows chime, etc).

But when it does boot up, it works completely fine - even for a whole day.

Then when I shut it down and restart it will just not work. Is the PSU is not powerful enough?

Computer specs:

AMD Athlon 64 6000+ AM2 Processor Retail Dual Core AM2
Gigabyte GA-MA78GM-S2H AMD780G 5200HT DDR2 VGA PCIE2.0 RAID GbLAN 1394a
DDR2 2048MB(2G Single stick)PC6400 800Mhz (I have two these, totalling 4 gig)
Samsung 250G 7200RPM SATAII
NVIDIA Geforce 8800GT 512 meg
Liteon 20x DVD Dual Layer DVD+/-Rburner Black Retail (DH-20A4P)
CoolerMaster Centurion RC330 Elite Black with 420W + HD Audio(RC330KKRA)

Some extra details:

- I have tried plugging/replugging all cables in, so it's not the cables or anything obvious like that.

- I use an NVIDIA Geforce 8800GT 512 meg card

- The onboard video works every time, if I switch from the Geforce card to the onboard video

- I have had one or two 3D game crashes the last month (in GTA IV), but not enough to warrant suspicion I don't think.

- The computer was frequently beeping at me, with a few freezes here and there, until I cleaned out all the dust last week.
8 answers Last reply
More about monitor signal times
  1. Welcome to the forums!

    Check the operating temperature of your video card with GPU-Z.
    There are some firmware updates to deal with temperature problems.
    Your power supply has enough power.
  2. evongugg said:
    Welcome to the forums!

    Check the operating temperature of your video card with GPU-Z.
    There are some firmware updates to deal with temperature problems.
    Your power supply has enough power.


    Hi there,

    thanks heaps for your reply. I have downloaded GPU-Z and ran it for a while. Here is a screenshot of my results. What do you make of it? I am also downloading the latest firmware. Thanks again for your help :)

  3. That card is running quite cool, is it loaded or just idling in desktop??

    Have you checked if the card is seated properly in the PCI-e slot??
  4. Exactly. Based on the symptoms of your problem - I would check and recheck your graphic card is seated properly in it's slot. Sometimes it will take a few attempts to get it right depending on your case and how bent or straight or well designed it all is.
  5. Okay, since it's now not working at all (!!?!?), I will take it out and reseat it.

    Thanks again for your help. Here goes nothing. Will report back
  6. Okay...reseated once. Nothing happened. Reseated twice.. nothing. Third time... A CHARM!

    Thank you very much for your wisdom. I shall see how it travels over the next few reboots.
  7. Well, if the issue comes back to haunt you, we'll be here.
  8. Well all is looking good after three reboots!

    I don't want to push things too far unnecessarily just yet (eg rebooting just to test the card).

    Thanks again for your excellent help and advice. It's worked so far!
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