Dell Inspiron 27 7720 All-in-One Owner's Manual page 6

Chapter 9: Troubleshooting........................................................................................................ 112
Dell SupportAssist Pre-boot System Performance Check diagnostics...............................................................112
Running the SupportAssist Pre-Boot System Performance Check............................................................... 112
System-diagnostic lights.................................................................................................................................................112
Recovering the operating system.................................................................................................................................114
Backup media and recovery options............................................................................................................................ 114
Wi-Fi power cycle.............................................................................................................................................................115
Chapter 10: Getting help and contacting Dell..............................................................................116
6 Contents