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

Hello All,
After upgrade to 1.8.0 I have lost the TPM module. It is no longer seen in BIOS (should usually be seen under Security). Bitlocker has stopped working as a result as well. An upgrade to 1.8.1 did not help either.

Have you guys faced such a problem before?

Cheers,
Allthebest

 

shut down, then hold the power button for about 30 seconds, the battery light will start flashing, sit back and wait for the BIOS to reload the defaults, I had to do this as BIOS thought I had no battery or AC connected after 1.8.0

 

Thanks GoNz0.
Care to explain? You mean you opened up the laptop, removed the battery (maybe the RAM as well)?

 

I did explain, just follow what I said.

 

Sorry, had difficulty to understand that sentence:
"I had to do this as BIOS thought I had no battery or AC connected after 1.8.0"

 

hold the power button for about 30 seconds, the battery light will start flashing, sit back and wait for the BIOS to reload the defaults.


That isn't hard to understand though?

Sent from my SM-G920F using Tapatalk

 

Let me ask a couple of questions to make sure I understand what you are saying by reloading the BIOS to defaults.

First, when you say that the BIOS is reloaded to defaults, are you saying that the computer, after doing the "power button for 30 seconds" procedure, will end up with the BIOS version that was installed when the computer was new?

Also, would there be any point to reloading the BIOS to defaults every time before upgrading to a new BIOS?

 

No no no, BIOS remains the latest version, just its settings are reset to defaults. You may have to change something if you have changed it before (like SATA mode to AHCI if you were not in default RAID).

 

Thanks for that clarification.

 

Strangely enough the Shutdown+30 Second Power Button does not work on my XPS 9560.
I tried the Ctrl+Esc+Insert AC Adapter which led me to option for BIOS reset. But that did not work either. Is there any other thing to try before I contact the Dell guys (which might lead to a MoBo replacement)?

 

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.