Question New CPU; fTPM corrupted error, pressed N and now no monitor signal

Sam6751 · Dec 29, 2024

I have just upgraded from a ryzen 5 2600 to a ryzen 7 5700x, running on an asus prime b450m-a. Prior to switching, I updated the bios to the correct version to support the new chip. CPU fan was going crazy on startup then calmed down, and I got an error message saying the fTPM was corrupted or structure changed.

I have bitlocker enabled on my OS drive (I have windows 10), and I selected the option to not reset the fTPM (pressing N). After this, my monitor shows no signal.

I have tried cutting AC power and removing the CMOS battery for a few minutes, and the system will power on like normal but with no signal on the monitor. I reinstalled the old cpu and there is still no signal.

I'm hoping I haven't busted anything permanently.

BoomerD · Dec 30, 2024

Maybe a silly question, but is your monitor connected to a video card or the motherboard's graphic output from the CPU?

mikeymikec · Dec 30, 2024

Bitlocker - hopefully you've taken a copy of the backup key.

TPM error - a customer on Win11 recently had this error on their laptop, luckily the drive wasn't really encrypted so resetting TPM allowed the machine to boot.

Sam6751 · Dec 30, 2024

BoomerD said:
Maybe a silly question, but is your monitor connected to a video card or the motherboard's graphic output from the CPU?

No its definitely connected to the gpu.

Sam6751 · Dec 30, 2024

mikeymikec said:
Bitlocker - hopefully you've taken a copy of the backup key.

TPM error - a customer on Win11 recently had this error on their laptop, luckily the drive wasn't really encrypted so resetting TPM allowed the machine to boot.

Sure, but how do I reset the tpm? I have no display.

mikeymikec · Dec 30, 2024

Use the Clear CMOS jumper?

Sam6751 · Dec 30, 2024

mikeymikec said:
Use the Clear CMOS jumper?

Tried shorting the pins, then removed the cmos battery and shorted them again with no display after startup.

mindless1 · Dec 30, 2024

I'm wondering if an ESD event scrambled the bios, and would try this:
(sorry for the pic, the silly Asus PDF text won't copy/paste)
AFAIK the flash drive needs to be a single partition, FAT32. Might also need to be USB port #1, whichever that is.

I'm just assuming your board doesn't have a dual bios, or if it does, then I wonder why it isn't automagically reverting to the 2nd bios or if there might be something in the owner's manual about that.

Sam6751 · Dec 30, 2024

mindless1 said:
I'm wondering if an ESD event scrambled the bios, and would try this:
(sorry for the pic, the silly Asus PDF text won't copy/paste)
AFAIK the flash drive needs to be a single partition, FAT32. Might also need to be USB port #1, whichever that is.

I'm just assuming your board doesn't have a dual bios, or if it does, then I wonder why it isn't automagically reverting to the 2nd bios or if there might be something in the owner's manual about that.

View attachment 114011

Whike I try to discharge myself of static electricity before doing anything, I can't guarantee I didn't fry anything.

Where did you find that picture from? It's not in my board manual. As far as I'm aware the b450m-a doesn't support bios flashback.

BoomerD · Dec 30, 2024

It’s been several years since I dealt with the ASUS stuff, but it looks like your board has a “bios flashback” button.
Also: https://www.asus.com/us/motherboard...a-ii/helpdesk_cpu?model2Name=PRIME-B450M-A-II

Ryzen 7 5700X (3.4GHz,65W,L3:32M,8C) ALL 3211

If your motherboard BIOS version number is greater than the BIOS version listed above, then you will not need to flash your BIOS. However, if your BIOS version is smaller than the version listed above, then you will need to select and download the latest BIOS to update your system. We kindly remind you that there is a certain risk level involved in BIOS flashing, please refer to " BIOS Flashing Method ". If you still have doubts, we will strongly advise you to consult with a PC Professional or your PC dealer for further assistance.

Sam6751 · Dec 30, 2024

BoomerD said:
It’s been several years since I dealt with the ASUS stuff, but it looks like your board has a “bios flashback” button.
Also: https://www.asus.com/us/motherboard...a-ii/helpdesk_cpu?model2Name=PRIME-B450M-A-II

I mentioned in a previous reply that I updated the bios to the correct version prior to doing all this. Also, I'm pretty sure I don't have the "II" version of this board. I did however check the compatibility on the asus website for this cpu, and it should be fine.

In2Photos · Dec 30, 2024

Sam6751 said:
I mentioned in a previous reply that I updated the bios to the correct version prior to doing all this. Also, I'm pretty sure I don't have the "II" version of this board. I did however check the compatibility on the asus website for this cpu, and it should be fine.

Just want to make sure, after updating the BIOS did you boot back into the BIOS or your OS to verify that the update worked correctly? After that you installed the 5700X and got the error message? The fans ramped up and you have never seen that happen before? If so that is a little alarming.

Any debug lights on the motherboard?

mindless1 · Dec 30, 2024

Sam6751 said:
Whike I try to discharge myself of static electricity before doing anything, I can't guarantee I didn't fry anything.

Where did you find that picture from? It's not in my board manual. As far as I'm aware the b450m-a doesn't support bios flashback.

The pic is a screenshot of "BIOS_Update_Manual_(English)" page 7:

https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/PRIME_A320M-A/E13571_BIOS_Update_EM_V4_WEB.pdf?model=PRIME%20B450M-A

Found on this page:

PRIME B450M-A｜Motherboards｜ASUS Global

Discover PRIME B450M-A: The ultimate AMD AM4 motherboard, packed with cutting-edge features for an unmatched tech experience.

www.asus.com

Page 5 on the same bios update manual, mentions flash drive should be fat32/16 format and single partition.

mindless1 · Dec 30, 2024

Personally, I'd put the old CPU back in and try flashing to the old bios version that was working, just in case the new one is buggy or corrupt (? would've thought it did a checksum to verify integrity in that case?).

Sam6751 · Dec 30, 2024

In2Photos said:
Just want to make sure, after updating the BIOS did you boot back into the BIOS or your OS to verify that the update worked correctly? After that you installed the 5700X and got the error message? The fans ramped up and you have never seen that happen before? If so that is a little alarming.

Any debug lights on the motherboard?

I updated the BIOS a little while back and have been using the OS as normal. I got the error message on the first startup after installing the new CPU, and the fans were going at unusual speeds. Unfortunately, this board doesn't have any error lights on it: the manual doesn't mention it, and I can't see anything while watching it power on.

Sam6751 · Dec 30, 2024

mindless1 said:
Personally, I'd put the old CPU back in and try flashing to the old bios version that was working, just in case the new one is buggy or corrupt (? would've thought it did a checksum to verify integrity in that case?).

I read the update manual you posted, and it seems like (unless I misunderstood) that I need the display to do anything, which I don't have functional. The lack of signal from the monitor persists even when I reinstalled the old CPU.

In2Photos · Dec 30, 2024

Sam6751 said:
I updated the BIOS a little while back and have been using the OS as normal. I got the error message on the first startup after installing the new CPU, and the fans were going at unusual speeds. Unfortunately, this board doesn't have any error lights on it: the manual doesn't mention it, and I can't see anything while watching it power on.

OK, when you boot now do the fans spin up or do nothing? How many sticks of RAM do you have installed. Try with just 1 in the slot farthest from the CPU.

mindless1 · Dec 30, 2024

Sam6751 said:
I read the update manual you posted, and it seems like (unless I misunderstood) that I need the display to do anything, which I don't have functional. The lack of signal from the monitor persists even when I reinstalled the old CPU.

That's not what I took it to mean, rather that if you turn system on with all ducks in a row as described, this is the "auto" recovery tool that flashes the bios file on the flash drive. If you have to have a working bios and screen (and keyboard) that would be the other methods and pages that I didn't screenshot? No?

I don't see the point of NOT trying it at this stage, what do you have to lose unless you don't have some old ≥32MB flash drive lying around, so you had to buy one?

Sam6751 · Dec 30, 2024

In2Photos said:
OK, when you boot now do the fans spin up or do nothing? How many sticks of RAM do you have installed. Try with just 1 in the slot farthest from the CPU.

Everything looks normal now on startup except for the lack of display. After trying a few times with the new CPU the fans seem to be going at their normal speeds. I have also been trying this with the 2nd RAM slot from the CPU only, as the manual says to start with 2 and 4.

mindless1 · Dec 30, 2024

Here is what our AI overlords think you should do:

However, it seems a bit odd to me that it seems to describe shorting the clear CMOS jumper and leaving it in the shorted position while rebooting and trying to auto-flash the bios, then waiting for the flashing to finish before turning off system and putting the clear CMOS jumper back in the original position. I have never seen motherboard instructions that required this, so possibly you should research that before proceeding.

Requirements:

A USB flash drive with a capacity of 1GB or more
The latest BIOS file for your motherboard model

Steps:

Download the BIOS: Go to the ASUS Download Center and download the latest BIOS file for your ASUS Prime B450M-A motherboard

Save the file to your USB flash drive

Format the USB Drive: Format the USB flash drive to FAT16 or FAT32
. Make sure it's a single-sector USB drive (think this means single partition)

Rename the BIOS File: Rename the downloaded BIOS file to BIOSNAME.CAP (replace BIOSNAME with the actual BIOS file name) (meaning make the name 8 characters or less with a .CAP file extension, there should be a utility included with the bios file that will do this for you)

Insert the USB Drive: Plug the USB flash drive into the USB BIOS FlashBack port on your motherboard

Power Off the System: Turn off your computer and unplug it from the power source

Short the CMOS Jumper: Locate the CMOS jumper on your motherboard (refer to the manual for its exact location) and short it to clear the CMOS

Power On the System: Plug the power back in and turn on your computer
. The BIOS FlashBack LED will start blinking, indicating that the BIOS flash process has started

Wait for Completion: The LED will stop blinking once the BIOS flash is complete

This process may take a few minutes.

Reboot: After the LED stops blinking, turn off the computer, remove the USB flash drive, and reset the CMOS jumper to its original position

Turn the computer back on.

Enter BIOS: You should now be able to enter the BIOS setup and proceed with the usual setup steps.

In2Photos · Dec 30, 2024

Sam6751 said:
Everything looks normal now on startup except for the lack of display. After trying a few times with the new CPU the fans seem to be going at their normal speeds. I have also been trying this with the 2nd RAM slot from the CPU only, as the manual says to start with 2 and 4.

I don't suppose you have another GPU you could test with to rule that out? You could also try re-seating your GPU.

In2Photos · Dec 30, 2024

mindless1 said:
Here is what our AI overlords think you should do:

However, it seems a bit odd to me that it seems to describe shorting the clear CMOS jumper and leaving it in the shorted position while rebooting and trying to auto-flash the bios, then waiting for the flashing to finish before turning off system and putting the clear CMOS jumper back in the original position. I have never seen motherboard instructions that required this, so possibly you should research that before proceeding.

Requirements:

A USB flash drive with a capacity of 1GB or more
The latest BIOS file for your motherboard model

Steps:

Download the BIOS: Go to the ASUS Download Center and download the latest BIOS file for your ASUS Prime B450M-A motherboard

Save the file to your USB flash drive

Format the USB Drive: Format the USB flash drive to FAT16 or FAT32
. Make sure it's a single-sector USB drive (think this means single partition)

Rename the BIOS File: Rename the downloaded BIOS file to BIOSNAME.CAP (replace BIOSNAME with the actual BIOS file name) (meaning make the name 8 characters or less with a .CAP file extension, there should be a utility included with the bios file that will do this for you)

Insert the USB Drive: Plug the USB flash drive into the USB BIOS FlashBack port on your motherboard

Power Off the System: Turn off your computer and unplug it from the power source

Short the CMOS Jumper: Locate the CMOS jumper on your motherboard (refer to the manual for its exact location) and short it to clear the CMOS

Power On the System: Plug the power back in and turn on your computer
. The BIOS FlashBack LED will start blinking, indicating that the BIOS flash process has started

Wait for Completion: The LED will stop blinking once the BIOS flash is complete

This process may take a few minutes.

Reboot: After the LED stops blinking, turn off the computer, remove the USB flash drive, and reset the CMOS jumper to its original position

Turn the computer back on.

Enter BIOS: You should now be able to enter the BIOS setup and proceed with the usual setup steps.

Looking at the board online and in the manual but I don't see a BIOS flashback LED and none of the rear USB ports is labeled as a BIOS Flashback port.

mindless1 · Dec 30, 2024

I'd try whatever the manual calls USB port 0 or if no 0 then 1, or look at the port colors and see if there's one that's a different color than black or blue (or teal if it has USB 3.1).

If you use a USB flash drive with an access LED on it, then you might get some indication of initial identification and after a moment, reading the bios file off of it? Up to you, what to try. I don't have that board or another Asus of similar generation so your first-hand attempts are going to be better than my further guesses.

Sam6751 · Dec 30, 2024

mindless1 said:
I'd try whatever the manual calls USB port 0 or if no 0 then 1, or look at the port colors and see if there's one that's a different color than black or blue (or teal if it has USB 3.1).

If you use a USB flash drive with an access LED on it, then you might get some indication of initial identification and after a moment, reading the bios file off it it? Up to you, what to try. I don't have that board or another Asus of similar generation so your first-hand attempts are going to be better than my further guesses.

Well I tried installing my old GPU and plugging in a USB with an led indicator and it seems to have opened into the correct bios screen and the monitor is functional. I have no clue if the bios crashfree thing worked but I'm going to try and reset the default settings and boot into windows.

In2Photos · Dec 30, 2024

Sam6751 said:
Well I tried installing my old GPU and plugging in a USB with an led indicator and it seems to have opened into the correct bios screen and the monitor is functional. I have no clue if the bios crashfree thing worked but I'm going to try and reset the default settings and boot into windows.

Alright, making progress! This is with the new CPU?

Question New CPU; fTPM corrupted error, pressed N and now no monitor signal

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