Computer POST and beep codes The computer power on self test (POST) will test your computer to make sure it can boot properly(test hardware and sys requirements), once it does the computer will then finish the boot process. Normally, if your computer passes the POST test it will beep once or possibly twice. If the computer fails the POST then it will either not beep at all or generate a beep code. The beep code you receive can indicate what may be wrong with your computer. The beep codes vary depending on your motherboard BIOS manufacturer(AMI, Award, Phoenix). You can find what BIOS you are using by paying attention to the BIOS screen when your computer boots up. It should tell you what brand BIOS. You can usually find the meaning of your beep code by doing a simple google search i.e "phoenix beep codes". Below, I have provided links to sites which go over beep codes and their respective meaning. AMI BIOS Beep Codes Award BIOS Beep Codes Phoenix BIOS Beep Codes -G33k Keywordscomputer beep codes, post beep codes, bios beep codes, computer beeps, computer will not start beeps, computer beeping, pc beep codes, award beep codes, phoenix beep codes, Ami beep codes