[XPS 9560] TPM module lost after upgrade of BIOS to 1.8.0/1.8.1

Quick updates for this thread:
I had a two hour call with the Dell technician to see if the TPM loss problem could be resolved. (Based on my prompt and the technician's guidance) I even tried opening up the laptop, removing the battery, removing the memory sticks, pressing the power button for 30 seconds (to drain charge) and putting everything back again. This did not help either.

Meanwhile I came to know that Dell has rolled back the availability of its BIOS version to 1.7.1 (the newest one it had released was 1.8.1, now the latest one available on Dell site is 1.7.1). So there seems to be a major flaw in the BIOS versions after 1.7.1

In any case after 2 hours of trying various things, the technician gave up and suggested a motherboard replacement. The laptop was bought in October 2017 and is the top of the line version (1TB SSD,...). It is appalling to see that a EUR 2600 machine would need a motherboard replacement within a few months of buying.

 

Have you tried running the BIOS upgrade again, or even downgrading to an older version? I believe I have seen other users on here that had the same issue, and reinstalling or downgrading brought the TPM screen back for them. I highly doubt that this is a hardware issue that calls for a motherboard replacement.

 

I tried many different things including reinstalling, downgrading, upgrading again, reseting BIOS, recovering BIOS etc. Nothing, unfortunately, is doing the trick for me this time. I had this issue with my XPS 9550 as well, at that time, thankfully, the CTR-ESC + power adapter insertion method worked and brought back the TPM. But this time it is stubborn.

 

That's weird, I did see that removing the battery & holding down the power button fixed it for other users as well. The link below might be something else to look into if you haven't already. Although, I'm not sure if it'll work if the system is unable to detect the TPM module...

http://en.community.dell.com/techce.../w/wiki/11850.how-to-change-tpm-modes-1-2-2-0

I used this method to switch my TPM module to 2.0 awhile back on my 9550. It might be worth trying to see if you can install/reinstall TPM 1.2 or 2.0.

 

Yes, since the system was not able to detect the TPM, no further installs/upgrades to the TPM drivers was possible.
Anyway, the Dell technician came last week and he replaced the motherboard. Now TPM is working fine.