Dell W21C - Camera, Battery, and Cooling Servicing; Removing the Wireless Card; Replacing the Wireless Card

Replacing the rubber feet............................................ 84
Procedure............................................................................................... 84
Post-requisites........................................................................................ 84
Removing the middle frame......................................... 85
Prerequisites........................................................................................... 85
Procedure............................................................................................... 86
Replacing the middle frame......................................... 89
Procedure............................................................................................... 89
Post-requisites........................................................................................ 89
Downloading drivers..................................................... 91
Downloading the audio driver...................................................................91
Downloading the graphics driver............................................................. 92
Downloading the USB driver................................................................... 92
Downloading the chipset driver............................................................... 93
Downloading the network driver............................................................. 94
System setup...............................................................96
Boot Sequence....................................................................................... 96
Navigation keys.......................................................................................96
BIOS overview.........................................................................................97
Entering BIOS setup program..................................................................97
System Setup Options............................................................................ 98
Flashing the BIOS.................................................................................. 103
Troubleshooting..........................................................105
Flashing the BIOS..................................................................................105
Reinstall Windows using a USB recovery drive...................................... 105
Enhanced Pre-Boot System Assessment (ePSA) diagnostics................106
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