- Notes, cautions, and warnings
- Working on your computer
- Chassis
- Field service information
- Screw size list
- Recommended tools
- Critical callouts
- Working on your computer
- Disassembly and reassembly
- Side Cover
- Front Bezel
- Front panel door
- Installing front panel door
- Storage device
- Optical drive
- M.2 PCIe SSD
- SD card
- Memory modules
- Expansion card
- Power supply unit
- Intrusion switch
- Power switch
- Speaker
- Coin-cell battery
- Heat sink assembly
- Processor
- System fan
- VGA Daughterboard
- System board
- Technology and components
- System setup
- Troubleshooting
- Getting help
Dell OptiPlex 5055 Ryzen APU Tower Owner's Manual
LED error code after replacing coin cell battery
After replacing the coin-cell battery, the system will not power on and the LED blinks 2-2 in amber. This is a known behavior when the super I/O is reset to default. Press and hold the power button until the system powers on.
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