The "TPM device not detected" error on a Dell Vostro 5568 is a well-known issue, often triggered after a BIOS update (such as version 1.14.1 or 1.20.0) or during a re-image of the system. This guide provides a comprehensive "repack" of solutions to restore your Trusted Platform Module (TPM) functionality.

The laptop may boot into a "BIOS Recovery" screen. Select Reset to BIOS Defaults and restart. 3. Firmware "Repack" and Update Sequence

If you prefer not to open the chassis, Dell has a built-in recovery sequence to reset the system state. Shut down the laptop and unplug the power cable. Step 2: Press and hold Ctrl + Esc on the keyboard.