Dell Enhanced Pre-Boot System Assessment ā ePSA Diagnostic 3.0............................................................... 77
Built-in self-test (BIST)................................................................................................................................................... 78
M-BIST........................................................................................................................................................................... 78
LCD Power rail test (L-BIST)................................................................................................................................... 78
LCD Built-in Self Test (BIST)................................................................................................................................... 78
Diagnostic LED...................................................................................................................................................................79
Recovering the operating system................................................................................................................................. 80
Real Time Clock reset...................................................................................................................................................... 80
Backup media and recovery options.............................................................................................................................80
WiFi power cycle............................................................................................................................................................... 80
Drain residual flea power (perform hard reset).......................................................................................................... 81
Chapter 8: Contacting Dell.......................................................................................................... 82
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