My Computer is Beeping...What do These Beeps Mean?

IBM BIOS
Indicator    Message
One Short Beep    Normal POST system OK
Two Short Beeps    POST error, see screen for error code
No Beeps    Power, Power Supply Loose Card or Short
Continuous Beep    Power, Power Supply Loose Card or Short
Repeating Short Beep    Power, Power Supply Loose Card or Short
One Long and One Short Beep    System Board
One Long and Two Short Beeps    Video (Mono/CGA Display Circuitry)
One Long and Three Short Beeps    Video (EGA) Display Circuitry
Three Long Beeps    Keyboard Card Error
One Beep,    Blank or Incorrect Display / Video Display Circuitry


AMI BIOS
Indicator    Message
One Short Beep    DRAM Refresh Failure
Two Short Beeps    Parity Circuit Failure
Three Short Beeps    Base 64k RAM Failure
Four Short Beeps    System Timer Failure
Five Short Beeps    Processor Failure
Six Short Beeps    Keyboard Controller Error
Seven Short Beeps    Virtual Mode Exception Error
Eight Short Beeps    Display Memory Failure
Nine Short Beeps    ROM BIOS Checksum Failure
One Long and Three Short Beeps    Base/Extended Memory Failure
One Long and Eight Short Beeps    Display/Retrace Test Failure
 

Award BIOS
Indicator    Message
One Long and Two Short Beeps    Video Error
Two Short Beeps    Any Non-Fatal Error
One Short Beep    No Error During POST
 

Phoenix BIOS
Indicator    Message
One, One & Three Beeps Failure    CMOS Read/Write
One, One & Four Beeps    ROM BIOS Checksum Failure
One, Two & One Beep    Programmable Interval Timer Failure
One, Two & Two Beeps    DMA Initialization Failure
One, Two & Three Beeps    DMA Page Register Read/Write Failure
One, Three & One Beep    RAM Refresh Verification Error
One, Three & Three Beeps    First 64K RAM Chip/Data Line Failure
One, Four & Two Beeps    Parity Failure First 64K RAM
One, Four & Three Beeps    Fail-Safe Timer Feature (EISA Only)
One, Four & Four Beeps    Software NMI Port Failure (EISA Only)
Two, One & One through Two, One & Four    |
Two, Two & One through Two, Two & Four    |First 64K RAM Chip/Data Line Failure
Two, Three & One through Two, Three & Four    |
Two, Four & One through Two, Four & Four    |
Three, One & One Beep    Slave DMA Register Test Failure
Three, One & Two Beeps    Master DMA Register Test Failure
Three, One & Three Beeps    Master Interrupt Mask Register Failure
Three, One & Four Beeps    Slave Interrupt Mask Register Failure
Three, Two & Four Beeps    Keyboard Controller Failure
Three, Three & Four Beeps    Screen Memory Failure
Three, Four & Two Beeps    Screen Retrace Failure
Four, Two & One Beep    Timer Tick Failure
Four, Two & Two Beeps    Shutdown Failure
Four, Two & Three Beeps    Gate A20 Failure
Four, Two & Four Beeps    Unexpected Interrupt in Protected Mode
Four, Three & One Beep    RAM Test of Memory Above 64 Failed
Four, Three & Two Beeps    Programmable Interval Timer, Channel 2 Test Failure
Four, Three & Four Beeps    Realtime Clock Test Failure
Four, Four & One Beep    Serial Port Test Failure
Four, Four & Two Beeps    Parallel Port Test Failure
Four, Four & Three Beeps    Math Co-processor Test Failure

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