Dell Latitude 5480 Owner's Manual page 7

Chapter 7: Diagnostics................................................................................................................ 95
Device status lights.......................................................................................................................................................... 95
Battery status lights......................................................................................................................................................... 96
Chapter 8: Troubleshooting......................................................................................................... 97
Handling swollen Lithium-ion batteries........................................................................................................................ 97
Dell Enhanced Pre-Boot System Assessment - ePSA Diagnostic 3.0...............................................................98
Running the ePSA diagnostics................................................................................................................................. 98
Built-in self-test (BIST)................................................................................................................................................... 98
M-BIST...........................................................................................................................................................................98
LCD Power rail test (L-BIST)................................................................................................................................... 99
LCD Built-in Self Test (BIST)................................................................................................................................... 99
Backup media and recovery options.............................................................................................................................99
LAN status LED................................................................................................................................................................100
Recovering the operating system................................................................................................................................100
Real Time Clock reset.....................................................................................................................................................100
WiFi power cycle.............................................................................................................................................................. 101
Drain residual flea power (perform hard reset)........................................................................................................ 101
Chapter 9: Contacting Dell.........................................................................................................103
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