Dell Latitude 7490 - Page 6

Dell Enhanced Pre-Boot System Assessment — ePSA Diagnostic 3.0............................................................... 87
Built-in self-test (BIST)................................................................................................................................................... 87
M-BIST........................................................................................................................................................................... 87
LCD Power rail test (L-BIST)................................................................................................................................... 87
LCD Built-in Self Test (BIST)................................................................................................................................... 88
Diagnostic LED behavior..................................................................................................................................................88
Recovering the operating system................................................................................................................................. 90
Real Time Clock reset...................................................................................................................................................... 90
Backup media and recovery options..............................................................................................................................91
WiFi power cycle................................................................................................................................................................ 91
Drain residual flea power (perform hard reset).......................................................................................................... 91
Chapter 8: Getting help and contacting Dell................................................................................ 92
6 Contents