Reconnect the battery and AC adapter, then power on the device.
Solving the "TPM Device Not Detected" Error on Dell Vostro 5568 Go to product viewer dialog for this item. The "Alert! TPM device not detected" error on the Dell Vostro 5568 dell vostro 5568 tpm device not detected extra quality
Press and hold the power button for to discharge any remaining static power. Reconnect the battery and AC adapter, then power