I FINALLY FIGURED OUT A WORKAROUND!!!!!!! But it is tricky to do!

So if you feed spiw0323.exe the fbct32a.bin file, it will obviously flash, but will lock up the system. However, if you are quick, you can run spiw0323.exe and update to fbct32a.bin and it will begin to erase. RIGHT after the erase is done, and it says 'checking' you can cntrl-c and break out of the flashing program.

Then you can just run the FBCT13A.bin update and since the EC firmware is blank, it'll happily flash it

so the commands I ran were

Spiw0323.exe fbct32a.bin /V 29A

as soon as it says 'checking' ctrl-c out and go back to prompt

then run

SPIW0323.exe FBC13A.bin /V 29A and it will flash. As soon as I did this, my sleep started working normally and my computer no longer hangs when booting

I have a thinkcenter e32 motherboard.

I got the same problem, bricked my system. Turn on computer, CPU fan running, but no beeps, no display.

My computer is ThinkCentre M8500t-n000, the motherboard is IS8XM, bios version FBKT56AUS, ThinkCentre Embedded Controller -[FBCT13A-1.13]
. I've read from the Lenovo forum that it can use bios for m93p, so I download and update the latest bios from " support.lenovo.com/us/en/downloads/ds035753 ", but in windows 10, there is an "invalid device descriptor".

I googled and found "forums.lenovo.com/t5/ThinkCentre-A-E-M-S-Series/M93p-Tiny-BIOS-FBKTD2A-is-broken-bad-BIOS-update-on-website/td-p/4281617 ", It said that bios must be update incrementally upgrade some major milestone releases, including:74,c4,d2.
I used the USB bios updater for flashing with fbjt74usa.zip, when running "SPI032 FBCT29A.bin" step, at the verifying stage, the computer freezes, I tried bios recovery, clear CMOS, but no one worked.

I found there are 3 chips on MB: mx25l6473e, mx25l3273e, 25q808vsig, I don't know which one is the bios chip.
I have another m8500t, I dump bios with "fptw64 -bios -d binreg.bin", It shows
----flash devices found ---
N25Q064 ID:0x20BA17 size: 8192KB (65536Kb)
N25Q032 ID:0x20BA16 size: 4096KB (32768Kb)

I ordered a cha341a programmer, but I never do that before, what steps should I do?

Sorry for my English, any words are appreciated.

There are lots of descriptions here in the forum, read [Guide] Using CH341A-based programmer to flash SPI EEPROM

As you found out your 12 MB bios is distributed to 2 chips, 64Mbit and 32 Mbit. Search for the datasheets to find chip specs (voltage), backup the chips, make several reads, they all should be a 100% identical- you need a valid backup of the bricked bios.

I've read in this thread, looks like I should flash the FBC13A.bin, but I don't know how to do that.
At #23, nikkotwh said:

Zitat

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"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)"

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The CH341A is still on the way, maybe I can try to read the 25q808vsig and compare it with FBCT29A that I flashed.

I can't download FBCT13A.bin from the link posted at #23 and #25, Is there other links for FBCT13A.bin?

Thanks.

Zitat von lfb6 im Beitrag #33

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....., backup the chips, make several reads, they all should be a 100% identical- you need a valid backup of the bricked bios.

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Zitat von lfb6 im Beitrag #35

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Zitat von lfb6 im Beitrag #33

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....., backup the chips, make several reads, they all should be a 100% identical- you need a valid backup of the bricked bios.

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Avoid blindly flashing something to something, make valid backup of every chip before you flash it!

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I read the 25q80bvsig using ch341 and compare it with fbct29a.bin, result is:
"the files sizes are different, However, the beginning of the bigger file is identical with the content of the smaller file"

So, If I download the FBCT13A.bin and replace the content in the dumped file, and program it back will work?

I can't download fbct13a.bin from the link posted at #18 by @itsupport and #23 by @eutechnyx, Can someone upload a fbct13a.bin?

Thanks!

I'm sorry, not the time to search for these files you mention myself now.You should have an idea what you're doing when replacing content, without that you need a perfectly fine guide. Flashing with size mismatch is never a good thing!

EDIT: 1MB chip, 128 kB firmware, normally would explain this result, so you flashed EC firmware fbct29a.bin successfully.

So you'd need your own firmware 1,13, add some 'FF' at the end to make it a 1MByte file and flash it back. Easiest way would probably be to read the corresponding chip on your other system.

I have googled fbct13a.bin, but didn't found.

Zitat von Shaun im Beitrag #32

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......I have another m8500t, I dump bios with "fptw64 -bios -d binreg.bin", It shows ......

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The sop8 test clip is bad, bought another one, still on the road.

Zitat von Shaun im Beitrag #41

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The sop8 test clip is bad, bought another one, still on the road.

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Thanks!