Dell OptiPlex 3070 Tower Service Manual page 4

Chapter 5: Troubleshooting......................................................................................................... 74
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................74
Running the SupportAssist Pre-Boot System Performance Check................................................................ 74
Diagnostics.......................................................................................................................................................................... 74
Diagnostic error messages.............................................................................................................................................. 76
System error messages....................................................................................................................................................79
Recovering the operating system................................................................................................................................. 80
Backup media and recovery options.............................................................................................................................80
WiFi power cycle............................................................................................................................................................... 80
Chapter 6: Getting help............................................................................................................... 81
Contacting Dell................................................................................................................................................................... 81
4 Contents