Dell Precision 5860 Tower Service Manual

Also see for D03T: Service manual Setup and specifications Manual

Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operatingsystem. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operatingsystem. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to itsfactory state.You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into theirprimary operating system due to software or hardware failures.For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide atwww.dell.com/serviceabilitytools. Click SupportAssist and then, click SupportAssist OS Recovery.Real Time Clock—RTC resetThe Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model DellLatitude and Precision systems from No POST/No Boot/No Power situations. You can initiate the RTC reset on the systemfrom a power-off state only if it is connected to AC power. Press and hold the power button for 25 seconds. The system RTCreset occurs after you release the power button.NOTE: If AC power is disconnected from the system during the process or the power button is held longer than 40seconds, the RTC reset process gets aborted.The RTC reset will reset the BIOS to Defaults, un-provision Intel vPro and reset the system date and time. The following itemsare unaffected by the RTC reset:● Service Tag● Asset Tag● Ownership Tag● Admin Password● System Password● HDD Password● Key Databases● System LogsNOTE: The IT administrator's vPro account and password on the system will be un-provisioned. The system needs to gothrough the setup and configuration process again to reconnect it to the vPro server.The below items may or may not reset based on your custom BIOS setting selections:● Boot List● Enable Legacy Option ROMs● Secure Boot Enable● Allow BIOS DowngradeBackup media and recovery optionsIt is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposesmultiple options for recovering Windows operating system on your Dell PC. For more information. see Dell Windows BackupMedia and Recovery Options.Wi-Fi power cycleAbout this taskIf your computer is unable to access the Internet due to Wi-Fi connectivity issues a Wi-Fi power cycle procedure may beperformed. The following procedure provides the instructions on how to conduct a Wi-Fi power cycle:NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.Steps1. Turn off your computer.Troubleshooting 137

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