Precision T3500/T5500/T7500 Workstations Diagnostic Lights and Beep Codes

State

LED Pattern ( 1 2 3 4 )

LED Description

Power LED

State Assignment

State Description

Pb0a

1- Off 2- Off 3- Off 4- Off

System Unplugged

System is not plugged into AC, PSU is not plugged into system board, or control panel not connected to system board.

Pb0b

1- Off 2- Off 3- Off 4- Off

ACPI S0; Normal Operation

System is on with no failures detected. This is actually a BIOS controlled state and is also S0e.

Pb0c

1- Off 2- Off 3- Off 4- Off

ACPI S1

Windows Standby State.

Pb1

1- Off 2- Off 3- Off 4- Off

ACPI S4 or S5

Hibernate or Soft off. System plugged in, but either turned off or in Windows Hibernation State.

Pb2

1- Off 2- Off 3- Solid 4- Off

-

Reserved

Reserved

Pb3

1- Off 2- Off 3- Solid 4- Solid

ACPI S3

Suspend to RAM Windows Standby State.

Pb4

1- Off 2- Green 3- Off 4- Off

-

Reserved

Reserved

Pb5

1- Off 2- Green 3- Off 4- Green

-

Reserved

Reserved

Pb6

1- Off 2- Green 3- Green 4- Off

-

Reserved

Reserved

Pb7

1- Off 2- Blink 3- Blink 4- Blink

ACPI S0, hand off to BIOS control

System on. BIOS not execution. This is the transition state to POST states.

Pb8

1- Green 2- Off 3- Off 4- Off

-

Reserved

Reserved

Pb9

1- Blink 2- Off 3- Off 4- Blink

Non-System board Regulator Failure

A power failure has been detected on a plug-in component such as VRM, Video Riser, or Memory Riser.

Pb10

1- Blink 2- Off 3- Blink 4- Off

PSU Failure

PSU may be bad or PSU cable may be crimped creating a short on a main power rail. (PS_ON asserted, PS_PWRGOOD not asserted)

Pb11

1- Blink 2- Off 3- Blink 4- Blink

PSU Cable Failure

All PSU cables may not be properly connected to system board. (PS_ON asserted, missing a main power rail)

Pb12

1- Blink 2- Blink 3- Off 4- Off

System board Regulator Failure

A power failure has been detected in one of the onboard system board regulators. This could be caused by a failed system board component or by a plug-in device creating a short on a regulated power rail. (PS_ON asserted, PS_PWRGOOD asserted, SYS_PWRGOOD de-asserted)

Pb13

1- Blink 2- Blink 3- Off 4- Blink

Mismatch

Hardware detected a population incompatibility with a critical system component such as CPU, VRM, PSU, or MEMORY RISER.

Pb14

1- Green 2- Green 3- Green 4- Off

-

Reserved

Reserved

Pb15

1- Green 2- Green 3- Green 4- Green

-

Reserved

Reserved

State

LED pattern ( 1 2 3 4 )

LED Description

State Name

State assignment

State description

S0a

1- Off 2- Off 3- Off 4- Off

OFF

OFF

Power LED Off. No power is supplied to the system.

S0e

1- Off 2- Off 3- Off 4- Off

ON

Normal Operation, ACPI S0

Power LED Solid Green. System has successfully booted and is operating normally.

S1

1- Off 2- Off 3- Off 4- Solid

RCM

System is in Recovery Mode

BIOS checksum failure was detected and the system is now in recovery mode.

S2

1- Off 2- Off 3- Solid 4- Off

CPU

CPU

CPU configuration activity is in progress or a CPU failure was detected.

S3

1- Off 2- Off 3- Solid 4- Solid

MEM

Memory

Memory subsystem configuration activity is in progress. Appropriate memory modules were detected but a memory failure has occurred.

S4

1- Off 2- Solid 3- Off 4- Off

PCI

PCI device

PCI device configuration activity is in progress or PCI device failure was detected.

S5

1- Off 2- Solid 3- Off 4- Solid

VID

Video Card

Video subsystem configuration activity in progress or video subsystem failure.

S6

1- Off 2- Solid 3- Solid 4- Off

STO

Storage

Storage device configuration in progress or storage subsystem failure.

S7

1- Off 2- Solid 3- Solid 4- Solid

USB

USB

USB subsystem configuration activity in progress or USB subsystem failure.

S8

1- Solid 2- Off 3- Off 4- Off

MEM

Memory

Memory subsystem configuration activity is in progress. No memory modules were detected.

S9

1- Solid 2- Off 3- Off 4- Solid

MBF

System board

Fatal system board failure detected.

S10

1- Solid 2- Off 3- Solid 4- Off

MEM

Memory

Memory subsystem configuration activity is in progress. Memory modules have been detected but appear to be incompatible or in an invalid configuration.

S11

1- Solid 2- Off 3- Solid 4- Solid

PRV

Other pre-video activity

Indicates routine system activity preceding video initialization.

S12

1- Solid 2- Solid 3- Off 4- Off

CFG

Resource configuration

System resource configuration in progress.

S13

1- Solid 2- Solid 3- Off 4- Solid

Reserved

Reserved for future use. This pattern is being considered to indicate the Visual Off state on the Dimension systems.

S14

1- Solid 2- Solid 3- Solid 4- Off

POV

Other post-video activity

Indicates routine system activity subsequent to video initialization.

S15

1- Solid 2- Solid 3- Solid 4- Solid

STD

Boot hand off

Indicates End of POST process. LEDs are normally in this state briefly as POST completes. Once the hand-off to the OS is done, the LEDs turn off and transition to S0e state.

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

Secondary DMA register test in progress or failure

1-2-1

Timer Test in progress or failure

3-1-2

Primary DMA register test in progress or failure

1-2-2

DMA initialization in progress or failure

3-1-3

Primary IMR test in progress or failure

1-2-3

DMA page register read/write test in progress or failure

3-1-4

Secondary 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

2-2-1

1st 64 K RAM chip or data line failure - bit 4

4-2-4

Unexpected interrupt in Protected Mode

2-2-2

1st 64 K RAM chip or data line failure - bit 5

4-3-1

RAM test in progress or failure above address 0FFFFh

2-2-3

1st 64 K RAM chip or data line failure - bit 6

4-3-2

No memory in Bank 0

2-2-4

1st 64 K RAM chip or data line failure - bit 7

4-3-3

Interval Timer Channel 2 test in progress or failure

2-3-1

1st 64 K RAM chip or data line failure - bit 8

4-3-4

Time-Of-Day Clock test in progress or failure

2-3-2

1st 64 K RAM chip or data line failure - bit 9

4-4-1

Super I/O chip failure

2-3-3

1st 64 K RAM chip or data line failure - bit A

4-4-4

Cache test failure

2-3-4

1st 64 K RAM chip or data line failure - bit B

2-4-1

1st 64 K RAM chip or data line failure - bit C

2-4-2

1st 64 K RAM chip or data line failure - bit D