Initializing The Tpm For Txt Users; Nvram Backup Battery; Replacing The Nvram Backup Battery - Dell HHB Owner's Manual

Initializing the TPM for TXT users

Steps
1. While booting your system, press F2 to enter System Setup.
2. On the System Setup Main Menu screen, click System BIOS → System Security Settings.
3. From the TPM Security option, select On with Pre-boot Measurements.
4. From the TPM Command option, select Activate.
5. Save the settings.
6. Restart your system.
7. Enter System Setup again.
8. On the System Setup Main Menu screen, click System BIOS → System Security Settings.
9. From the Intel TXT option, select On.

NVRAM backup battery

The NVRAM backup battery installed in your system helps to retain the BIOS settings and configurations even if the power is switched
off.

Replacing the NVRAM backup battery

Prerequisites
NOTE: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same
or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's
instructions. See the safety instructions that came with your system for additional information.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that are shipped with your product.
1. Follow the safety guidelines listed in safety instructions section.
2. Follow the procedure listed in the Before working inside your system section.
3. Remove the following:
a. Hard drives or SSDs
b. Cooling shroud
c. Hard drive or SSD backplane
d. Hard drive or SSD cage
e. mezzanine card
f. NDC
g. IDSDM or rSPI card
h. System board
Steps
1. Locate the system battery on the system.
2. To remove the battery, press down firmly on the positive side of the connector and lift the battery out of the securing tabs at the
negative side of the connector.
3. To install a new system battery:
a) Support the battery connector by pressing down firmly on the positive side of the connector.
b) Hold the battery with the "+" facing up and slide it under the securing tabs at the positive side of the connector.
4. Press the battery straight down into the connector until it snaps into place.
112 Installing and removing blade components