Troubleshooting.......................................................... 136Flashing the BIOS.................................................................................. 136Flashing BIOS (USB key)....................................................................... 136Power-supply unit Built-in Self Test (BIST)............................................ 137Steps to confirm that power-supply unit is defective.......................138Enhanced Pre-Boot System Assessment (ePSA) diagnostics................138Running the ePSA diagnostics......................................................... 139Diagnostics............................................................................................ 139Wi-Fi power cycle.................................................................................. 140Getting help and contacting Dell................................. 141Self-help resources................................................................................. 141Contacting Dell...................................................................................... 14210
