I am now trying to replace the BIOS Region in my Dump by the BIOS downloaded from Lenovo.
I have identified the correct files for my machine (N2HETxxW) and found 2 files, FL1 and FL2.
As I assume, FL2 is for the EC and FL1 contains the main BIOS.
I just cannot figure out, what to do with the FL1 file. There are many guides out there, that start with removed a small section in the beginning and then ending up with the BIOS file. That does not work for me, since the FL1 is a lot smaller than the dump.
Could someone please provide a guide as to how to...
Nebukadnerzar_V
Member
Last Activity: 04-18-2025, 12:44 PM
Joined: 10-13-2017
Location: Aachen - Aachen-Mitte
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Thanks for the effort! However, with that file, the machine does not POST, like with the original dump.
I don't know, whether the issue is actually in the "windows-key-section" or there is something else wrong.
I reflashed the clean BIOS and reprogrammed the S/N and Type/Model, so the machine is working again.
Also, Windows is still able to be activated, even though the Key is no longer present on the machine.
I will like the machine as it is now and say Thank you for all the help!...Leave a comment:
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Thank you for the detailed response!
Then I will at least not give up hope on my machines either
Could you provide the Thunderbolt Controller ROM and maybe some hints as to where to flash it to?
Even though it did not immediately fix your issue, I would still also like to give it a try on my machines.Leave a comment:
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I also have the 3 machines of this type with this exact issue.
Power / Charging seems fine, can be switched on and off with power button, but no picture (internal/HDMI), no reaction to keyboard, no beeps.
Reflashing BIOS (with clean one) does not change anything.
Also I noticed, the built in screen flashed for a split second - probably just backlight.
Ram is soldered, so nothing to do there.
Was there any progress with your machine, left_cap?Leave a comment:
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Thank you for sharing this information!
I am wondering, why my DMI is empty now after just flashing the Main-BIOS.
I did not change the EC firmware. How can I get back the DMI data?...Leave a comment:
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Thank you! That fixed the machine!
Is there a tool or another way to transfer the DMI Data (S/N, UUID, Windows License) from the broken dump to the new BIOS?
I found a "Lenovo DMI Decryptor" Tool on GitHub, but it was unable to find the DMI block in my dump....Leave a comment:
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Hi!
I have a ThinkCentre M900 (Tiny), which won't POST. It turn's on, when AC is connected. Fan spins down after a while, so EC is working, but no picture and no beep.
Hopefully, it can be fixed by cleaning the BIOS.
Machine Type: 10FL
Model Number: S1QS00
S/N: S4BB8418
Attached is the Dump.
Thanks in Advance!...Leave a comment:
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Dell Optiplex 760 USFF BIOS Mod Request for QuadCore CPUs
Hi guys!
I have a Dell Optiplex 760 USFF (Ultra-Small Form-Factor).
It currently only supports Dual-Core CPUs and will halt with an error message, when a QuadCore is installed.
I have seen people running QuadCores in these machines, but the BIOS needs to be modded.
Since I have not found the modded BIOS to download anywhere, I am asking you guys for help:
Could you please add support for QuadCore CPUs (in my case the Core2Quad Q9550) to the BIOS?
I have attached the Dump of my machine.
S/N: SRW2K4J
Reg Model: DCTR... -
Thanks for the quick reply!
Sadly, it did not fix the issue.
I guess, there is something wrong with the HW then - maybe the iGPU is faulty.
Thanks anyways!...Leave a comment:
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Hi there!
I also got a T440s here, that will power on, fan runs on normal speed, but the screen stays blank.
I tried resetting the CMOS multiple times. But it did not change the issue.
I also tried to get a clean BIOS from Lenovo, but only end up with .FL1 and .FL2 files. I tried the method in "[URL="https://www.badcaps.net/forum/showthread.php?t=103526"]BIOS guides, methods, resources and tools[/URL]", but they don't work for these files.
Could someone be so kind to help me here?
Type: 20AR-S2V900
S/N: PF-036RRX...Leave a comment:
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That worked! Thanks so much, I would have had no other option that to swap the entire board for >200€.
You guys really do gods work here - helping others for free!
What is the best way to support you guys - direct donation to the forum?...Leave a comment:
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Thanks for the quick help!
Sadly, it did not change the behavior.
The Machine does appear to be RAM-Training (one reboot after CMOS-Reset).
Then it stays on, CPU gets warm, fans spin up, but the screen stays off (external screen also).
When I take RAM out, I get a peep-code, but the with RAM installed, there is not beep code and also no diagnostic LEDs on the Keyboard.
I guess, the CPU might be braindead or is there something more than can be done to the BIOS?...Leave a comment:
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Hello there!
I got a ThinkPad X1 Extreme (1st gen), that won't Post - just a black screen.
Since I was unable to extract the BIOS from the update I can download, I would be extremely happy, if someone could try to clean my BIOS for me.
Model: 20MF-000RGE
S/N: R9-0RPLRA
18/09
Please find the original dump attached....Leave a comment:
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Thanks for the clarification.
As I said, the 16 in 25Q16 denotes this is the smaller chip with just 2 MB, so NOT this BIOS chip.
Go for the 25Q128, this is your 16 MB BIOS chip ......Leave a comment:
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Hey guys!
You can call me Nebukad
I have studied in germany to receive a Masters Degree in Electronic Engineering and worked in that field for almost 6 years now.
For many years, I have also been fixing laptops and all sorts of other electronics, and am now pivoting more towards that kind of work.
I know my way around a soldering iron, a Flash-Programmer and a Hex-Editor, but since BIOS's seem to get more and more complicated, I will be sure to stick around to get some more knowledge about this topic, while also sharing some of my own.
Cheers...Leave a comment:
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First things first:
The first IC you tried is definitely not the BIOS chip, but most likely a temperature or voltage monitoring ICs
BIOS-(Flash-)Chips can be identified by their marking starting with 25... (or in some cases 24 ...).
Note that 24...-Type ICs will have 16 pins, so you need the bigger area on your programmer, but 99% of the times, you will encounter 25...-Type chips.
So as you can now see, the two chips you found (U365 and U366) are indeed 25-Type flash ICs. So you're on the right track.
The next number in the marking (25Q[B]128 [/B]and...Leave a comment:
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Re: Samsung LE40M86BDX Clicking
steviewonder:
I registered, just to thank you!
That was exactly the Problem with my set. Would have never gone that far to desolder that pain-in-the-arse tin shield, to get to the Cap, if you would not have provided this information. Another TV saved from the yunk-yard.
Thanks again!
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