Dell Precision 7740 Service Manual page 6

LCD Built-in Self Test (BIST).................................................................................................................................. 118
Diagnostic LED..................................................................................................................................................................119
Recovering the operating system.................................................................................................................................119
Real-Time Clock (RTC Reset)...................................................................................................................................... 120
Battery status LED..........................................................................................................................................................120
Backup media and recovery options........................................................................................................................... 120
WiFi power cycle..............................................................................................................................................................120
Drain residual flea power (perform hard reset)........................................................................................................ 121
Chapter 6: Getting help............................................................................................................. 122
Contacting Dell................................................................................................................................................................. 122
6 Contents