Dell Precision T7500 Service Manual

Also see for Precision T7500: Technical guide Setup & features

S2 3- Solid4- OffCPU CPU failure was detected.S31- Off2- Off3- Solid4- SolidMEM MemoryMemory subsystem configuration activity is in progress.Appropriate memory modules were detected but amemory failure has occurred.S41- Off2- Solid3- Off4- OffPCI PCI device PCI device configuration activity is in progress or PCIdevice failure was detected.S51- Off2- Solid3- Off4- SolidVID Video Card Video subsystem configuration activity in progress orvideo subsystem failure.S61- Off2- Solid3- Solid4- OffSTO Storage Storage device configuration in progress or storagesubsystem failure.S71- Off2- Solid3- Solid4- SolidUSB USB USB subsystem configuration activity in progress orUSB subsystem failure.S81- Solid2- Off3- Off4- OffMEM Memory Memory subsystem configuration activity is in progress.No memory modules were detected.S91- Solid2- Off3- Off4- SolidMBF Systemboard Fatal system board failure detected.S101- Solid2- Off3- Solid4- OffMEM MemoryMemory subsystem configuration activity is in progress.Memory modules have been detected but appear to beincompatible or in an invalid configuration.S111- Solid2- Off3- Solid4- SolidPRVOther pre-videoactivityIndicates routine system activity preceding videoinitialization.S121- Solid2- Solid3- Off4- OffCFG Resourceconfiguration System resource configuration in progress.S131- Solid2- Solid3- Off4- SolidReservedReserved for future use. This pattern is beingconsidered to indicate the Visual Off state on theDimension systems.S141- Solid2- Solid3- Solid4- OffPOVOther post-videoactivityIndicates routine system activity subsequent to videoinitialization.S151- Solid2- Solid3- Solid4- SolidSTD Boot handoffIndicates End of POST process. Lights are normally inthis state briefly as POST completes. Once the hand-offto the OS is done, the lights turn off and transition toS0e state.Beep CodesWhen errors occur during a boot routine that cannot be reported on the monitor, the computer may emit a beep code thatidentifies the problem. The beep code is a pattern of sounds: for example, one beep followed by a second beep, thenfollowed by a burst of three beeps (code 1-1-3) means that the computer was unable to read the data in nonvolatilerandom-access memory (NVRAM). If the system loses power and beeps constantly when you turn it back on, the BIOS isprobably corrupted.