My desktop booths with a single beep: indicating BIOS check success.

CPU Fan keeps running, keyboard capslock and num lock respond when I boot it.But all I can see is black screen. I have tried different screen and different VGA cable as well.

I am out of all ideas as of what to check. Any suggestions or guidance is most welcomed.

  • Motherboard : GA-H81M-DS2 rev 2.1
  • Processor : Intel i3-4130

Note : Last resort suggested was to use 512Mb graphics card to reroute the display, but that's an educated guess and I don't want to bet more money without knowing if that will really solve my problem.


Update : I was able to see bios screen but only for few seconds and then whole screen scrambles to colourful noise(Please refer to video for more details) and keyboard(Numlock/caps lock) stops responding.

Also, I noticed that after multiple attempts (probably due to heat over time) the functional screen time was increased to a couple of minutes, but ultimately it did scramble.

I have also tried CMOS reset multiple time, same outcome.

Video enter image description here enter image description here

  • Perhaps the onboard graphics support has been disabled. Try resetting the BIOS along with an update.
    – Bib
    Dec 1, 2022 at 17:48
  • 1
    Im no expert but according to pcspecialist.co.uk/forums/threads/… beep might mean OK, or it could mean a memory error depending on the BIOS manufacturer?
    – davidgo
    Dec 1, 2022 at 17:54
  • What CPU are you using?
    – zomega
    Dec 1, 2022 at 17:54
  • @davidgo : I checked the motherboard beep code, 1 beep means all ok.
    – Mayank
    Dec 1, 2022 at 18:00
  • 1
    You have to try a different graphics card, monitor and video cable. This issue cannot be solved in an other way. It does not make sense to make wild guesses. You have to try different hardware.
    – zomega
    Dec 2, 2022 at 15:31

1 Answer 1


I looked into the manual on page 25 and there is an "Initial Display Output" setting in the BIOS. The default is "PCIe 1 Slot".

So you might think if a graphics card is not found then it will switch to onboard graphics.

But I found this reddit.com post and he says that the motherboard does not automatically switch to onboard VGA.

So you have two options:

  1. buy a graphics card
  2. or (see screenshot in manual): press del, then 3x right, (perhaps down), (perhaps enter), +, (perhaps enter), F10 to save, (perhaps left or right), enter

If you try a little you can get it running without buying a graphics card.

  • Thank you for all your efforts, and thank you again for sharing this. I will definitely try this on weekend and share my findings.
    – Mayank
    Dec 2, 2022 at 5:11
  • please refer to my "update" comment for updates.
    – Mayank
    Dec 2, 2022 at 15:07

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