Just went through this mess myself. The flash.cmd that Lenovo gives you is screwy and if the ReadGPIO.exe line doesn't run: the script logic doesn't work right. It ends up flashing an EC firmware that doesn't apply. No factory recovery method worked for me.

I ended up copying the FBCT13A firmware from working M93p and burning it to the bricked M93p. I did this by de-soldering U107, a Macronix MX25L8006E, and putting in the my TL866II programmer. The SOP8-DIP8 Adapter that came with the programmer fit the chip. I didn't have a SOP8 chip-clip handy so I couldn't try the idea without de-soldering. It did however work and got the PC bootable again. Afterwards, I ran the bios update again by CD and it worked fine.

I am now on FBKTD5A BIOS with the original FBCT13A EC Firmware. FBCT29A and FBCT32A EC firmwares did not work on my platform.

Thanks for your insight on this @itsupport - can you provide the EC Files you have that did work, so @GreaT can try them later if needed, thanks!

Sure thing!

http://s000.tinyupload.com/index.php?file_id=12357716096243187606

Dear sir, i have exactly done the same as you. Running the command SPI042 FBCT32A.bin /V 32A
and pc halt. i can't boot and cant recover.
How do you manage to boot the pc again?
thank you
my pc is m83.

Do i need to desolder the cmos to fix?
thanks

@nikkotwh - sounds like you flashed EC, but didn't update the BIOS, so now you will need flash programmer (CH341A) + SOIC 8 test clip with cable
Unless you can make BIOS do recovery flash, google this model and or this brand and you'll find recovery BIOS flash instructions.

thanks
i have ordered the programmer.
Should i burn the FBCT13A from itsupport?

or should i burn the whole new bios without the EC firmware?
thanks

i mean isn't we got two files from the bios update pack?

One the EC file, and one bios rom.

So now i located the MX25L8006E chip, should i burn the EC or both EC and BIOS?

thanks

okay,
i bought the programmer with sop8 clip.
the clip doesn't seems to recognzie the chip. so i desolder the MX25L8006E.
Works well and read out the dump is the same as FBCT32A.bin.

So i programmed the FBCT13A firmware from @itsupport
Thanks so much.
soldered back the board and it started to beep. but not booting. (no beeping sound before)
So i insert the CD of latest bios file and try the pin 2-3 recovery mode.
The beep repeats and still no hope.(no post)

so i think maybe it is the problem of not connecting all connectors. As this is not a diy one but from lenovo. (i just connected the ATX power and 12v cpu power)
then i connect whatever it got, Bingo~ System boots.
And i surprisingly found the BIOS is on the latest one, i think the bios recovery was done without post.
But it also makes me cannot confirm is it just flashing the EC files will make the pc works or we need to recover the bios with recovery mode also.

Still the PC works again with latest bios FBKTD5A and FBCT13A EC firmware.
will stick to it and not flashing it again!

Thanks @Lost_N_BIOS and @itsupport

You only need to find correct software version, or connect it properly, then it would have recognized the chip. Sometimes Battery or main power must be connected to the board too, other times it must be removed, need to try both ways sometimes.

Anyway, sorry I missed helping on this, but I'm glad you finally got the system back up and running again @nikkotwh

Bricked my M93P after updating EC firmware manually a couple days ago...
Guys, i don't know which programmer are you using, but after programming your dump on my Sofitech SP-16B, got same dead mainboard.

Luckily, searched other forums and found correct FBCT13A EC dump that powered on my machine back to life. The dump file that was posted above is filled with 00 after adress 1FFFF.
My PC denied to turn on with it. There should be all FF instead. Tried twice to confirm.
Attached the correct EC dump here:
http://s000.tinyupload.com/index.php?fil...523377443475662

hello:
I used the usb bios updater for flashing with fbjtdbusa.zip,and I have a blank black screen too.
I used the CH341A to flashing mx25l6473e and mx25l3273e with NVRAM-Swap-In-FBKTD4AUS.7z(you shared),System boots,but the bios can't open the csm and loose my MTM serial, UUID ,EC version!(FBCT32A)
)
Now how can i do now？I have USB flash disk and ssd ,no CD.

@bloodgcat - You can't program in zip file, I hope you mean you extracted it first.
Sounds like you flashed wrong thing into EC BIOS chip (smallest one), flash in proper EC FW from above, and then to fix serial UUID etc, you have to give me your originally dumped BIOS from the chip before you erased and wrote to it, if you did not make a backup dump then we cannot fix.

Sorry, I don't know what you mean by "BIOS Can't open CSM"?

I extracted the ZIP，run wflash2.exe IMAGEFB.ROM.I think it only flashed main BIOS.not EC BIOS.
I don't make a backup......,but i have SN and MTM on m93p shell。
The BIOS,if I open the CSM,save and exit,the screen will be black.
But if I don't open the CMS,the Boot menu only have USB key：sandisk xxx FAT mode in uefi. I try to make fa32 or ntfs boot disk，but can‘t running.
Could you help me？

Posting here as the problem is extremely similar (if not the same), please let me know if it is more appropriate to open a new thread.

Situation: HW: Lenovo M93p SFF; bricked BIOS stuck at Lenovo logo. Probable cause (haven't been flashing anything for months now): Using a thunderbolt 2 cable instead of DP one in the dedicated GPU (nVidia Quadro NVS 510).

Tried disconnect-all-drives/cards, jumper 2-3 method: double short beep, screen comes up and then keeps stuck with "BIOS is recoverying..." on the bottom left of screen (yes, that's mispelled, but that's the way it is). If I put a key without the ROM files the behavior is different so I assume the procedure is good.

the integrated Ethernet card's link goes up but doesn't ask for an IP (usual behavior with vPro as in my case, so system unreachable for remote management).

I have a flash programmer but:
1. still unable to identify where the chip is
2. if/when I find it, don't know what to flash on it

Any suggestion? Thanks!

where exactly do you flash the fbct13a on to the MX25L8006E chip? I bricked my machine and used my tl-866 pro to program back the bios with the imageFB.rom file and the system boots, but i dont see where i can flash the fbct13a, is there a particular offset you load it into and combine it with the imagefb.rom file?


This is on a thinkstation e32 with a fbc13a firmware.