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