Handling swollen Lithium-ion batteries........................................................................................................................ 88
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................88
Running the SupportAssist Pre-Boot System Performance Check................................................................89
Built-in self-test (BIST)................................................................................................................................................... 89
M-BIST...........................................................................................................................................................................89
LCD Power rail test (L-BIST)................................................................................................................................... 90
LCD Built-in Self Test (BIST)................................................................................................................................... 90
System-diagnostic lights................................................................................................................................................. 90
Recovering the operating system................................................................................................................................. 92
Real-Time Clock (RTC Reset)........................................................................................................................................92
Backup media and recovery options.............................................................................................................................93
Wi-Fi power cycle..............................................................................................................................................................93
Drain residual flea power (perform hard reset)......................................................................................................... 93
Chapter 6: Getting help and contacting Dell................................................................................ 94
Contents 5