If the device is detected but "not ready," you may need to manually flash the firmware using the Dell TPM 2.0 Firmware Update Utility . Solved: Dell Vostro 5568 - Alert! TPM device not detected.

If comfortable, open the base cover and disconnect the main battery and the CR2032 coin-cell battery for at least 30 seconds.

The most frequent cause for a missing TPM is a firmware state lock that can only be cleared by a total power drain. Shut down the laptop and disconnect the AC adapter.

While holding those keys, plug the AC adapter back in.

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.