Dell Inspiron 14 5409 - Page 5

Clearing BIOS (System Setup) and System passwords..................................................................................... 81
Chapter 5: Troubleshooting.........................................................................................................83
Locate the Service Tag or Express Service Code of your Dell computer ..............................................83
SupportAssist diagnostics............................................................................................................................................... 83
Built-in self-test (BIST)................................................................................................................................................... 83
System board built-in self-test (M-BIST)............................................................................................................. 84
Display panel power rail built-in self-test (L-BIST)............................................................................................. 84
Display panel built-in self-test (LCD-BIST)...........................................................................................................85
Outcome........................................................................................................................................................................ 85
Recovering the operating system................................................................................................................................. 86
System diagnostic lights..................................................................................................................................................86
Enabling Intel Optane memory....................................................................................................................................... 87
Disabling Intel Optane memory...................................................................................................................................... 87
Drain residual flea power (perform hard reset)......................................................................................................... 88
WiFi power cycle............................................................................................................................................................... 88
Chapter 6: Getting help and contacting Dell................................................................................ 89
Contents 5