Unsolved
1 Rookie
•
8 Posts
0
22
Dell Inspiron 15 3502 cannot activate TPM
Inspiron 3502
Hello,
I am pretty sure I had TPM activated since my PC is running Windows 11 (and was delivered with it!). But after updating the BIOS to 1.16, the PC stopped booting - it had lost UEFI boot and was set to legacy, with the respective option greyed out.
I removed (and replaced) the BIOS battery (waiting a few minutes) and reset everything to "optimized values". Since that, I could re-enable UEFI boot, but *not* TPM:
I can activate it in BIOS and save it, but after every reboot, it's deactivated again - and Windows keeps showing compatibility issues in the lower right corner of the desktop. (It's def the TPM issue, I ran the compatibility check).
Any idea how to solve this?
Chino de Oro
5 Practitioner
5 Practitioner
•
5.9K Posts
0
July 20th, 2024 09:14
Check to see if you can revert it to a previous working BIOS version.
zazzel
1 Rookie
1 Rookie
•
8 Posts
0
July 21st, 2024 06:23
@Chino de Oro , I just flashed 1.15 - no change. Still doesn't allow me to successfully activate TPM.
Chino de Oro
5 Practitioner
5 Practitioner
•
5.9K Posts
0
July 21st, 2024 09:51
Reset BIOS settings to default values save and reboot. Verify if BIOS settings set to UEFI boot mode, Secure Boot is enabled.
If the issue is persisted with other BIOS version, the firmware update was not the cause of TPM issue.
zazzel
1 Rookie
1 Rookie
•
8 Posts
0
July 22nd, 2024 05:18
I did all that - problem still there. I can select and save "TPM" in the BIOS, but it immediately forgets after exiting the BIOS setup utility.
And I *definitely* know TPM was active before - the problem is a remainder of the previously mentioned issue of suddenly not finding the boot device due to UEFI boot being deactivated & not selectable (which I solved by removing the BIOS battery for a few minutes & replacing it - following the procedure in the service manual).
Thanks for your help btw - if you have any more ideas, I'll try them.