Solution (1)
Accepted Solutions
I too had this problem for a long time on several computers at work but managed to solve it.
During my quest to find a solution I tried everything but it never occurred to me that I never shut down my computer and unplugged to power cord. I have always shut it down with the power cord still in, just restarted the computer or have it gone in sleep mode. I bet most corporate do this using sleep mode or have the AC plugged in when shut down.
Well how stupid did I feel when I shut down my computer completely, unplugged it from the AC and let it be for 30 second. When I plugged in the AC again and turned on the computer the magic happened. LOL The TPM alert was gone. For some reason shutting down the computer and unplugging the AC for 30 seconds seems to do something allowing the bios to find the tpm again.
So I tried the same on a second computer and the same stupid fix worked on that one. Well in the end we did this on all the computers encountering this and the same fix applied for all of them. So after this we are now upgrading the bios on all computers and any computer getting this error is easily fixed by shutting it down, removing the AC for 30 second and then firing up again. lol
So if you havent tried this then please try it and see if it works for you. Im not saying it is the fix but worth trying
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Additional Info on TPM:
Try the following information from this thread.
https://www.dell.com/community/XPS/DELL-XPS-9560-TPM-not-available/td-p/7352627
