Dell Precision 5540 - Page 4

Palm rest....................................................................................................................................................................... 45
Chapter 5: Troubleshooting.........................................................................................................49
Handling swollen Lithium-ion batteries........................................................................................................................ 49
Enhanced Pre-Boot System Assessment — ePSA diagnostics............................................................................ 49
Running the ePSA Diagnostics.................................................................................................................................50
Built-in self-test (BIST)................................................................................................................................................... 50
M-BIST...........................................................................................................................................................................50
LCD Power rail test (L-BIST)....................................................................................................................................51
LCD Built-in Self Test (BIST)....................................................................................................................................51
Beep codes......................................................................................................................................................................... 52
Recovering the operating system................................................................................................................................. 52
Real-Time Clock (RTC Reset)........................................................................................................................................52
Backup media and recovery options.............................................................................................................................52
WiFi power cycle............................................................................................................................................................... 52
Drain residual flea power (perform hard reset)......................................................................................................... 53
Chapter 6: Getting help...............................................................................................................54
Contacting Dell.................................................................................................................................................................. 54
4
Contents