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| 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
Award BIOS 286, 386, and 486
Indicator
Message
One Long and Three Short Beeps - Keyboard Controller Error
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;
Two, Three & One through
Two, Three & Four;
Two, Four & One through
Two, Four & Four - First 64K RAM Chip/Data Line Failure
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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