Dell Precision™ T3500 Service Manual--LED Codes
file:///C|/Biz%20Client/2015/NewBalance/Info%20Dev%20Root/New%20Balance/SM/A00/EN/Source/diags.htm[5/15/2015 11:40:58 AM]
1 - On
2 - On
3 - Off
4 - Off
Possible system resource configuration error.
1 - On
2 - On
3 - On
4 - Off
Other failure.
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.
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.
System Beep Codes
Beep
Code
Description
Beep
Code
Description
1-1-2
CPU register test in progress
2-4-3
1st 64 K RAM chip or data line failure - bit E
1-1-3
CMOS read/write test in progress or failure
2-4-4
1st 64 K RAM chip or data line failure - bit F
1-1-4
BIOS ROM checksum in progress or failure
3-1-1
Slave DMA register test in progress or failure
1-2-1
Timer Test in progress or failure
3-1-2
Master DMA register test in progress or failure
1-2-2
DMA initialization in progress or failure
3-1-3
Master IMR test in progress or failure
1-2-3
DMA page register read/write test in progress
or failure
3-1-4
Slave IMR test in progress or failure
1-3-1
RAM refresh verification in progress or failure
3-2-2
Interrupt vector loading in progress
1-3-2
1st 64 K RAM test in progress or failure
3-2-4
Keyboard controller test in progress or failure
1-3-3
1st 64 K RAM chip or data line failure (multi
bit)
3-3-1
CMOS power fail and checksum test in progress
1-3-4
1st 64 K RAM odd/even logic failure
3-3-2
CMOS Config info validation in progress
1-4-1
1st 64 K RAM address line failure
3-3-3
RTC/Keyboard controller not found
1-4-2
1st 64 K RAM parity test in progress or failure
3-3-4
Screen memory test in progress or failure
1-4-3
Fail-safe timer test in progress
3-4-1
Screen initialization test in progress or failure
1-4-4
Software NMI port test in progress
3-4-2
Screen retrace tests test in progress or failure
2-1-1
1st 64 K RAM chip or data line failure - bit 0
3-4-3
Search for video ROM in progress
2-1-2
1st 64 K RAM chip or data line failure - bit 1
4-2-1
Timer tick interrupt test in progress or failure
2-1-3
1st 64 K RAM chip or data line failure - bit 2
4-2-2
Shutdown test in progress or failure
2-1-4
1st 64 K RAM chip or data line failure - bit 3
4-2-3
Gate A20 failure
