SOLVED: The desktop won't come on, just 3 loud beeps - HP Laptop - iFixit
USI-7795 Operational Summary - English
3 Long Beeps 4 Short (higher pitched) repeated 5 times; then... - HP Support Community - 6514739
motherboard - Dell Optiplex GX270 - 2 short beeps - Super User
boot - Computer Beeps 3 Times on Startup - Super User
1 long and 3 short signals
CompTIA A+ Simulation - PC beep codes - Match up
What is a BIOS? * basic input/output system (BIOS), also known as the System BIOS * The BIOS software is built into the PC on a non-volatile ROM and is. - ppt
SIRIS, ALTO, and NAS: Explaining the Boot Process, Beep Codes, and BIOS
What Beep Codes Are, and How to Interpret Them - Make Tech Easier