BIOS Beep Codes

Here's some information about what those beeps mean when your computer won't boot. Beeps are shown as headings with the error message and description shown below. For a much more extensive list visit the BIOS Central Website found at the bottom of this page. We will be adding to this page from time to time.

1long, 2 short

Video adapter error
Either video adapter is bad or is not seated properly. Also, check to ensure the monitor cable is connected properly.

Repeating (endless loop)

Memory error
Check for improperly seated or missing memory.

1 long, 3short

No video card or bad video RAM
Reseat or replace the video card.

High frequency beeps while running

Overheated CPU
Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low

CPU
Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat. Check the CPU fan or BIOS settings for proper fan speed.

Created on ... July 11, 2008