- Notes, cautions, and warnings
- Working on your computer
- Disassembly and reassembly
- Stand
- Cable cover
- Side Cover
- Speaker cover
- Hard drive
- Optical drive
- System board shield
- Memory modules
- Solid State Drive
- Coin-cell battery
- WLAN card
- Heat sink
- Speaker
- Display panel
- Chassis frame
- Power supply unit
- VESA mount bracket
- Converter board
- System fan
- Intrusion switch
- Power and On-Screen Display buttons board
- Processor
- System board
- M.2 Intel Optane Memory Module 16 GB
- Technology and components
- System setup
- Boot Sequence
- Navigation keys
- System setup options
- System setup options
- General screen options
- System configuration screen options
- Security screen options
- Secure boot screen options
- Intel Software Guard Extensions options
- Performance screen options
- Power management screen options
- POST behavior screen options
- Virtualization support screen options
- Maintenance screen options
- System Log screen options
- Updating the BIOS
- Updating your system BIOS using a USB flash drive
- System and setup password
- Troubleshooting your computer
- Technical specifications
- Processors
- Memory specifications
- Video specifications
- Audio specifications
- Communication specifications
- Cards specifications
- Display specifications
- Drives specifications
- Port and connector specifications
- Power specifications
- Camera specifications - optional
- Stand specifications
- Physical specifications
- Environmental specifications
- Contacting Dell
Dell OptiPlex 5250 All-In-One Owners Manual
Power supply-built in self test BIST
Step to confirm that PSU is Defective
The Dell OptiPlex, and Desktops(AIO) features a new Power Supply Unit (PSU) Built -in Self Test (BIST). BIST can now be performed by simply connecting the AC power cord to the PSU.- Turn off the computer.
- Disconnect the power cord from the PSU and wait for 15 seconds.
- After 15 seconds, connect the power cord back to the PSU.
- If the LED stays on for 3 seconds and turns off, it indicates the PSU is functional. Continue with troubleshooting steps for other devices.
- If the LED does not come on, it indicates a hardware failure. The failed component can be PSU, system board or any device.
CAUTION:Ensure that you take adequate safety precautions before accessing the internal components of your system. Go through the Service Manual to know the steps to access the PSU and its cables.
- Disconnect the power cord from the PSU.
- Disconnect the PSU cables from the system board.
- Connect the power cord to the PSU
- If the LED stays on for 3 seconds and turn off, it indicates the PSU is functional. Continue with troublehooting steps for other devices.
- If the LED does not come on, it indicates a PSU failure. Dispatch PSU only
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