What is a Beep Code?
A Beep code is a Beep sound made by your computer, when your turn ON your computer. Troubleshooting BEEP code or BEEP is first step in troubleshooting your computer.
A little technical explanation
When you power on a computer the BIOS immediately takes control of the computer and performs the P.O.S.T (Power On Self Test). At the end of the POST the computer will play an audible ‘BEEP’ through either the PC’s internal speaker of through speakers attached to the sound card (if you have a built-in sound chip).
If the POST completed successfully without detecting any problems with then system will play a single short beep to let you know the test is complete and the computer will continue to startup and load the operating system.
If during the POST the BIOS detects a problem it will normally display a visual error message on the monitor explaining what the problem is. However, if a problem is detected before the BIOS initializes the video card, or a video card is not present or not detected then the BIOS will play several ‘BEEPS’ through the speaker to let you know there is a problem.
Depending on the type of the BIOS you have the BIOS may play beeps in a specific pattern to indicate what the problem is, or play the same beep a number of times indicating the problem. It is very important that you pay close attention to the number and/or pattern of the beeps your computer plays on startup.
AMI (American Megatrends International) BIOS Beep Codes.
AMI BIOS uses beeps of the same length and pitch. The error is intimated as a number of beeps. For example, 4 beeps indicated a timer failure.
|none||You’re supposed to hear at least one beep. If you truly don’t hear anything, either your computer’s power supply, motherboard, or PC speaker is no good.|
|1 Beep (No video)||System RAM Refresh failure.
|2 Beeps||Memory parity error Bad memory|
|3 Beeps||Base 64K mem failure Bad memory|
|4 Beeps||Timer not operational Bad motherboard|
|5 Beeps||Processor error Bad processor|
|6 Beeps||8042 Gate A20 failure Bad CPU or Motherboard|
|7 Beeps||Processor exception Bad processor|
|8 Beeps||Video memory error Bad video card or memory|
|9 Beeps||ROM checksum error Bad BIOS|
|10 Beeps||CMOS checksum error Bad motherboard|
|11 Beeps||Cache memory bad Bad CPU or motherboard|
|1 long, 3 short||Memory test failure|
|1 long, 8 short||Display test failure|
Award BIOS Beep Codes
Award BIOS uses beeps of varying duration. A long beep will typically last for 2 seconds while a short beep will last only 1 second. Award BIOS also uses beeps of different frequency to indicate critical errors.
|1 Long, 2 Short||Video adapter failure Bad video adapter|
|Repeating (Endless loop)||Memory error Bad memory or bad connection|
|1 Long, 3 Short||Video adapter failure Bad video adapter or memory|
|High freq. beeps (while running)||CPU is overheating CPU fan failure|
|Repeating High, Low beeps|| CPU failure Bad processor
Standard Original IBM POST Error Codes
|1 short beep||Normal POST – system is ok|
|2 short beeps||POST Error – error code shown on screen|
|No beep||Power supply or system board problem|
|Continuous beep||Power supply, system board, or keyboard problem|
|Repeating short beeps||Power supply or system board problem|
|1 long, 1 short beep||System board problem|
|1 long, 2 short beeps||Display adapter problem (MDA, CGA)|
|1 long, 3 short beeps||Enhanced Graphics Adapter (EGA)|
|3 long beeps||Keyboard / Keyboard card error|
Phoenix BIOS Beep Codes
Phoenix BIOS uses beep code patterns to indicate problems. In the table below the ‘-‘ indicates a brief pause between beeps.
Example: 1 – 1 – 2 would sound like BEEP <pause> BEEP <pause> BEEP BEEP
|1-1-2||CPU test failure|
|Low 1-1-2||System board select failure|
|1-1-3||CMOS read/write error|
|Low 1-1-3||Extended CMOS RAM failure|
|1-1-4||BIOS ROM checksum error|
|1-2-3||DMA read/write failure|
|1-3-1||RAM refresh failure|
|1-3-2||64KB RAM failure|
|1-3-3||First 64KB RAM failure|
|1-3-4||First 64KB logic failure|
|1-4-1||Address line failure|
|1-4-2||Parity RAM failure|
|1-4-3||EISA fail-safe timer test|
|1-4-4||EISA NMI port 462 test|
|2-1-1||64KB RAM failure|
|2-1-2||64KB RAM failure|
|2-1-3||64KB RAM failure|
|2-1-4||64KB RAM failure|
|2-2-1||64KB RAM failure|
|2-2-2||64KB RAM failure|
|2-2-3||64KB RAM failure|
|2-2-4||64KB RAM failure|
|2-3-1||64KB RAM failure|
|2-3-2||64KB RAM failure|
|2-3-3||64KB RAM failure|
|2-3-4||64KB RAM failure|
|2-4-1||64KB RAM failure|
|2-4-2||64KB RAM failure|
|2-4-3||64KB RAM failure|
|2-4-4||64KB RAM failure|
|3-1-1||Slave DMA register failure|
|3-1-2||Master DMA register failure|
|3-1-3||Master interrupt mask register failure|
|3-1-4||Slave interrupt mask register failure|
|3-2-2||Interrupt vector error|
|3-2-4||Keyboard controller failure|
|3-3-1||CMOS RAM power bad|
|3-3-2||CMOS configuration error|
|3-3-4||Video memory failure|
|3-4-1||Video initialization failure|
|4-2-3||Gate A20 failure|
|4-2-4||Unexpected interrupt in protected mode|
|4-3-1||RAM test failure|
|4-3-3||Interval timer channel 2 failure|
|4-3-4||Time of day clock failure|
|4-4-1||Serial port failure|
|4-4-2||Parallel port failure|
|4-4-3||Math coprocessor failure|