FZG
Senior Member
Last Activity: Today, 09:43 AM
Joined: 09-19-2022
Location: Halle
-
Probably yes, as long as the password is stored in the main bios. There might also be cases where the password is stored in the Embedded Controller, in this case a CH341a will not help you.... -
1. Yes
2. No
3. I heard several times that Dell has some sort of master unlock password for these situations but I don´t know if that´s true and you´d have to contact Dell support for that....Leave a comment:
-
For whatever reason it does not work this way for this laptop. Whatever I manually flash on the bios chip, DMI section will get automatically erased on first startup.
The only way to get the DMI in there properly is to use tools like Golden Key U1 tool. This is how I managed to get SN, MTM, PN, UUID back into the machine. Unfortunately U1 tool does not provide variables for "Preinstalled OS license" and "OA3 Key ID". I know that LVAR tool is able to write OA3 details but I can´t find a version that works with my machine (tried V225 and V229)....Leave a comment:
-
Nevermind, I found out about the Lenovo Golden Key / U1 Tool and was able to rewrite SN, MTM, Product Name and UUID this way. Only thing left blank at the moment is "Preinstalled OS license" (No DPK) and the OA3 Key ID.
Will see if I can get these edited back in as well but even if not, that´s fine.
Thanks for your help guys!...Last edited by FZG; 07-22-2025, 04:23 AM.Leave a comment:
-
Good call, don´t know how I missed that. However, this doesn´t change much.
I took off the main bios chip again and dumped its content before attempting another flash with the complete DMI block. When I checked the freshly made dump I noticed the file contents had changed compared to what I had put on there:
All DMI data that had been added prior was erased from the file and new content has been written (050FE0-057650). I can only imagine some contents of the bios are automatically rewritten at first startup. Maybe some security feature?
So I took the dumped...Leave a comment:
-
This is what I flashed onto the main bios chip. DMI will not show up in bios setup screen....Leave a comment:
-
That´s how I did it and how it usually works. But I still get INVALID in bios setup screen. Is some of the DMI supposed to go into the EC firmware as well? I read a document from SVOD project regarding programming of the KB9022, where they mention the "maintenance utility" or editing the EC dump as a solution......
Leave a comment:
-
Ah, very interesting getting to know more about the meaning of the model codes. The laptop has an R5-5500 CPU so it actually should be 13ALC6. Quite a strange situation with the EC firmware, indeed. I read one or two other posts in different forums mentioning the same problem with this laptop (KB only working in bios) but I would´ve imagined this to be a more widespread problem if Lenovo hosts faulty updates.
Regarding serial numbers and stuff, I re-flashed the main bios containing all the correct DMI data but in bios setup I still get "INVALID" for product name, MTM and...Leave a comment:
-
I still need to get the S/N, MTM and UUID programmed back into the machine (currently just says INVALID in bios setup). I guess I need to use the Lenovo maintenance utility for this, correct?Leave a comment:
-
@m1ch43lzm Thanks for your effort! I tried all previous versions down to H6CN18WW already, the effect is the same with all of them.
But I was able to get it fixed in the meantime by trying something else. I found out there is a similar laptop using the LA-K211P board and that is the Yoga 6-13ARE05. Looking up bios updates for this model I saw that the latest version is FFCN21WW and the update notes mention renaming the EC firmware to V109A. This seemed close enough to what was pre-programmed on the EC-chip I had bought, so I extracted the EC firmware belonging to the 13ARE05 and...Leave a comment:
-
Well yes, I flashed this several times and it is the main bios version I am running now. But the problem is with the EC firmware.Leave a comment:
-
Model Name: Yoga 6 13ALC6
S/N: MP20T9TY
MTM: 82ND000EGE
Board: GLC3A LA-K211P
The original faulty main bios dump is attached. Symptoms were power-on without picture, static power consumption. Version was "H6CN10WW"....Leave a comment:
-
Let me first say, you were absolutely right, it is indeed a problem with the EC firmware.
I bought a pre-programmed new EC chip and installed it and the keyboard started working again. Great, but then I managed to screw it up again: I saw that the EC firmware on the new chip was not on the latest version and also mismatched the bios version, so I updated bios and EC via the Lenovo installer. And guess what happened, I am back to where I was before. Keyboard does not work anymore except in bios setup.
Then I did some research and found out that it is possible to flash...Leave a comment:
-
I agree. Strange one. I ordered a pre-programmed new EC and will replace that once it arrives.Leave a comment:
-
I already tried disabling the YMC service and the sensor entry in device manager but it didn´t help. I also tried booting into a live linux and the symptoms are the same. Keyboard is working fine in UEFI setup but not in the OS. Touchpad works normally in all situations. When in any OS, only one key on the keyboard responds ("del"). Someone else suggested it might be a faulty EC and I think that seems plausible....Leave a comment:
-
That´s a good idea, thanks for the suggestion. Looking at the schematic, my laptop does not have the LID_360D_SW# signal. It is instead called TAB_SW# on my machine, I think. At least that is a signal coming from the sensor board, so it is probably meant to switch between laptop and tablet mode. But the 3.3V on that line are present and going straight into the EC....Leave a comment:
-
Did you ever solve this problem? I am having the same symptoms on a different Yoga laptop and I suspect the sensor to be faulty as well...Leave a comment:
No activity results to display
Leave a comment: