Removing the system board........................................................................................................................................ 89
Installing the system board........................................................................................................................................... 91
System board layout..................................................................................................................................................... 95
5 Troubleshooting......................................................................................................................... 97
Real-Time Clock (RTC Reset)........................................................................................................................................... 97
System diagnostic lights..................................................................................................................................................... 97
Diagnostic error messages................................................................................................................................................. 98
System error messages..................................................................................................................................................... 101
Recovering the operating system.....................................................................................................................................101
Flashing BIOS (USB key).................................................................................................................................................. 102
Flashing the BIOS...............................................................................................................................................................102
WiFi power cycle................................................................................................................................................................102
6 Getting help and contacting Dell................................................................................................ 103
A Cable cover ............................................................................................................................. 105
B Dust filter .................................................................................................................................111
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