User Manual
Table Of Contents
- Precision 5770 Service Manual
- Contents
- Working inside your computer
- Removing and installing components
- Drivers and downloads
- BIOS setup
- Troubleshooting
- Handling swollen Lithium-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System diagnostic lights
- Real-Time Clock (RTC Reset)
- Recovering the operating system
- Backup media and recovery options
- WiFi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
The following table shows different power and battery-status light patterns and associated problems.
Table 22. LED codes
Diagnostic light codes Problem description Recommended Solution
1,1 TPM detection failure Replace the system board.
1,2 Unrecoverable SPI flash failure Replace the system board.
1,5 i-Fuse failure Replace the system board.
1,6 EC internal failure Disconnect all power source (AC, battery, coin cell)
and drain flea power by pressing and holding down the
power button.
2,1 Processor failure Replace the CPU. If CPU is on-board, replace the
system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure
Replace the system board.
2,3 No memory or RAM (Random-Access
Memory) detected
Reseat and swap memory modules between the slots.
If the problem persists, replace the memory module
2,4 Memory or RAM (Random-Access
Memory) failure
Reseat and swap memory modules between the slots.
If the problem persists, replace the memory module.
2,5 Invalid memory installed Reseat and swap memory modules between the slots.
If the problem persists, replace the memory module.
2,6 System board or chipset error Replace the system board.
2,7 Display failure - SBIOS message Replace the LCD module.
2,8 Display failure - EC detection of power rail
failure
Replace the system board.
3,1 Coin-cell battery failure Reset the CMOS battery connection. If the problem
persists, replace the RTC battery.
3,2 PCI, video card/chip failure Replace the system board.
3,3 BIOS Recovery Image not found Flash latest BIOS version. If the problem persists,
replace the system board.
3,4 Recovery image found but invalid Flash latest BIOS version. If the problem persists,
replace the system board.
3,5 Power-rail failure Replace the system board.
3,6 System BIOS Flash incomplete Replace the system board.
3,7 Management Engine (ME) error Replace the system board.
Real-Time Clock (RTC Reset)
The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell systems from No POST/No
Power/No Boot situations. The legacy jumper enabled RTC reset has been retired on these models.
Start the RTC reset with the system powered off and connected to AC power. Press and hold the power button for
thirty (30) seconds
. The system RTC Reset occurs after you release the power button.
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Troubleshooting