
Beep Codes
When errors occur during a boot routine that cannot be reported on the monitor, the computer may emit a beep code that identifies the problem. The beep
code is a pattern of sounds: for example, one beep followed by a second beep, then followed by a burst of three beeps (code 1-1-3) means that the computer
was unable to read the data in nonvolatile random-access memory (NVRAM). If the system loses power and beeps constantly when you turn it back on, the
BIOS is probably corrupted.
1 - On
2 - Off
3 - On
4 - On
Possible system board resource and/or system board hardware failure.
1 - On
2 - On
3 - Off
4 - Off
Possible system resource configuration error.
1 - On
2 - On
3 - On
4 - Off
1 - On
2 - On
3 - On
4 - On
End of POST - Hand off to boot.
1 - Off
2 - Off
3 - Off
4 - Off
The system is in a normal operating condition after POST.
CPU register test in progress
1st 64 K RAM chip or data line failure - bit E
CMOS read/write test in progress or failure
1st 64 K RAM chip or data line failure - bit F
BIOS ROM checksum in progress or failure
Slave DMA register test in progress or failure
Timer Test in progress or failure
Master DMA register test in progress or failure
DMA initialization in progress or failure
Master IMR test in progress or failure
DMA page register read/write test in
progress or failure
Slave IMR test in progress or failure
RAM refresh verification in progress or failure
Interrupt vector loading in progress
1st 64 K RAM test in progress or failure
Keyboard controller test in progress or failure
1st 64 K RAM chip or data line failure (multi
bit)
CMOS power fail and checksum test in
progress
1st 64 K RAM odd/even logic failure
CMOS Config info validation in progress
1st 64 K RAM address line failure
RTC/Keyboard controller not found
1st 64 K RAM parity test in progress or failure
Screen memory test in progress or failure
Fail-safe timer test in progress
Screen initialization test in progress or failure
Software NMI port test in progress
Screen retrace tests test in progress or failure
1st 64 K RAM chip or data line failure - bit 0
Search for video ROM in progress
1st 64 K RAM chip or data line failure - bit 1
Timer tick interrupt test in progress or failure
1st 64 K RAM chip or data line failure - bit 2
Shutdown test in progress or failure
1st 64 K RAM chip or data line failure - bit 3
1st 64 K RAM chip or data line failure - bit 4
Unexpected interrupt in Protected Mode
1st 64 K RAM chip or data line failure - bit 5
RAM test in progress or failure above address
0FFFFh
1st 64 K RAM chip or data line failure - bit 6
1st 64 K RAM chip or data line failure - bit 7
Interval Timer Channel 2 test in progress or
failure
1st 64 K RAM chip or data line failure - bit 8
Time-Of-Day Clock test in progress or failure
1st 64 K RAM chip or data line failure - bit 9
1st 64 K RAM chip or data line failure - bit A
1st 64 K RAM chip or data line failure - bit B
1st 64 K RAM chip or data line failure - bit C
1st 64 K RAM chip or data line failure - bit D