HP Elite Dragonfly 13.5 Maintenance and Service Guide - Page 115
Storage, Back up all critical data before troubleshooting the drive.
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Table 6-45 Issues, possible causes, and fixes (continued) Items Procedures 4. Verify that Windows Device Manager detects the TB device. 5. Verify cable connection to TB port. 6. Test with a verified working TB board, if possible. NOTE: Thunderbolt is new technology. Thunderbolt cable and Thunderbolt device must be compatible with Windows. To determine whether your device is Thunderbolt Certified for Windows, see https://thunderbolttechnology.net/products. Storage Use this information to troubleshoot storage issues. NOTE: ● Back up all critical data before troubleshooting the drive. ● Before contacting support, HP recommends that you run a drive (HDD, SSD, M.2 drive) test using the HP PC Hardware Diagnostics (UEFI) tool on the suspected failed drive. ● Diagnose the hard drive using BIOS, Diagnostics built in the shipping image, or an external USB ( http://www8.hp.com/us/en/campaigns/hpsupportassistant/pc-diags.html?jumpid=va_r602_us/en/any/pps/pl_ot_ob_d ). ● HP recommends the drive quick test to quickly (less than 10 minutes) identify the malfunctioning drive. If the issue still exists, run Extensive Test (more than 2 hours, or loop mode, which runs until an error occurs). 106 Chapter 6 Troubleshooting guide