Dell Latitude 5531 - Page 6

Clearing BIOS (System Setup) and System passwords.........................................................................................136
Chapter 5: Troubleshooting........................................................................................................137
Handling swollen rechargeable Li-ion batteries........................................................................................................ 137
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 137
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 138
Built-in self-test (BIST)..................................................................................................................................................138
M-BIST......................................................................................................................................................................... 138
LCD Power rail test (L-BIST)................................................................................................................................. 139
LCD Built-in Self Test (BIST)..................................................................................................................................139
System-diagnostic lights................................................................................................................................................139
Recovering the operating system.................................................................................................................................141
Real-Time Clock (RTC Reset)....................................................................................................................................... 141
Auto RTC reset................................................................................................................................................................ 142
Backup media and recovery options........................................................................................................................... 142
Wi-Fi power cycle............................................................................................................................................................ 142
Drain residual flea power (perform hard reset)........................................................................................................142
Chapter 6: Getting help and contacting Dell...............................................................................144
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