Dell Latitude 3450 - Page 6

Deleting or changing an existing system setup password................................................................................ 119
Clearing CMOS settings.................................................................................................................................................120
Clearing BIOS (System Setup) and System passwords.........................................................................................120
Chapter 9: Troubleshooting........................................................................................................ 121
Handling swollen rechargeable Li-ion batteries.........................................................................................................121
Locate the Service Tag or Express Service Code of your Dell computer ......................................................... 121
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 122
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 122
Built-in self-test (BIST)..................................................................................................................................................122
M-BIST......................................................................................................................................................................... 122
LCD Power rail test (L-BIST)..................................................................................................................................123
LCD Built-in Self-Test (BIST)................................................................................................................................. 123
System-diagnostic lights................................................................................................................................................124
Recovering the operating system................................................................................................................................124
Real-Time Clock (RTC Reset)...................................................................................................................................... 125
Backup media and recovery options........................................................................................................................... 125
Wi-Fi power cycle............................................................................................................................................................125
Drain residual flea power (perform hard reset)........................................................................................................125
Chapter 10: Getting help and contacting Dell............................................................................. 127
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