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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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Dat ga ik 's proberen dan.... 
was laat op de avond en ik maar drukken en het pastte niet 
dus ik nog een keer goed kijken en ja hoor pinnetjes stonden nog ingeklapt /u/42776/crop6501d346786db_cropped.png?f=community)
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