Troubleshooting..........................................................136
Flashing the BIOS.................................................................................. 136
Flashing BIOS (USB key)....................................................................... 136
Power-supply unit Built-in Self Test (BIST)............................................ 137
Steps to conrm that power-supply unit is defective.......................138
Enhanced Pre-Boot System Assessment (ePSA) diagnostics................ 138
Running the ePSA diagnostics.........................................................139
Diagnostics............................................................................................ 139
Wi-Fi power cycle.................................................................................. 140
Getting help and contacting Dell................................. 141
Self-help resources.................................................................................141
Contacting Dell...................................................................................... 142
10