# Repairing a Malfunctioning TPM Board

#Recover from failure after replacing TPM board

Follow the steps below to replace the TPM Board while the password is encrypted. (The description here is also available in the product User Guide.)

1. Press the power button to turn on the printer.

   
   The printer's control panel displays a message that the TPM has been replaced.

2. Select [Restore from Backup].

   
   When the administrator password has been set, enter the password and tap [OK].

3. Connect the USB memory that contains the encryption key to the printer's external interface USB port.

4. Tap [Restore from Backup].

   
   The encryption key is restored to the TPM Board.

5. Tap [Restore from Backup].

   
   The printer restarts.

Caution / 注意

If the TPM board malfunctions thereby making it impossible to use the encryption keys, you cannot restore confidential information on the printer. For that reason, it is always necessary for the customer to backup the encryption keys on a USB memory.