[Request] Lenovo M920q BIOS unlock

BIOS/UEFI Modding BIOS Modding Requests
1

Hello,

i put a i7 9700 in my M920q, but it keeps throttling to 800 MHz. Can someone please unlock my bios so i have all settings for voltage and frequency offsets? I already tried a few amibcp versions but all keep crashing. Is it because i dumped it via SPI programmer?

I cannot flash the bios with FPT, its just not working on ThinkCenters what i read so far.

Thank you already

Here is my BIOS: BIOS_original.bin - Google Drive

2

Hello.

What do you mean by that? Cores are stuck at 800 MHz or frequency jumps from the max to lowest?

3

It jumps, as soon as i load the CPU via stress or similar it goes to 800MHz. I have the 65W cooler, so its not a thermal issue.

grafik

grafik
grafik212×543 4.96 KB

Heres a screenshot, it goes up to 35w, from then on it stays at 7w

4

BIOS region is located outside of the image.
There must be another 64 mbit chip with the second part.

5

Intel (R) Flash Programming Tool Version: 12.0.64.1551
Copyright (C) 2005 - 2020, Intel Corporation. All rights reserved.

Reading HSFSTS register… Flash Descriptor: Valid

--- Flash Devices Found ---
ID:0xEF4018    Size: 16384KB (131072Kb)
ID:0xEF4017    Size: 8192KB (65536Kb)

--- Flash Image Information --
Signature: VALID
Number of Flash Components: 2
    Component 1 - 16384KB (131072Kb)
    Component 2 - 8192KB (65536Kb)
Regions:
    DESC     - Base: 0x00000000, Limit: 0x00000FFF
    BIOS     - Base: 0x00C00000, Limit: 0x017FFFFF
    CSME     - Base: 0x00003000, Limit: 0x00BFFFFF
    GbE      - Base: 0x00001000, Limit: 0x00002FFF
    PDR      - NOT PRESENT
    EC       - NOT PRESENT
Master Region Access:
    BIOS     - ID: Read: 0x000F, Write: 0x000A
    CSME     - ID: Read: 0x000D, Write: 0x0004
    GbE      - ID: Read: 0x0009, Write: 0x0008
    EC       - ID: Read: 0x0101, Write: 0x0100

Total Accessible SPI Memory: 24576KB, Total Installed SPI Memory: 24576KB

6

Here is the dump of the other EEPROM BIOS_original2_64.bin - Google Drive

I already figured out i need to set a few parts of the 16mb file to FF FF FF to unlock the FD in the bios

Here is the merged BIOS:

7

I don’t know what happend. The Thinkcenter is dead. i flashed the original back to test again and its not starting anymore…

Is there a way to recover it?

8

I’d say there are kinda signs:

image
image979×512 6.51 KB

image

Did you dump twice with a 100% identical results and check the structure of the dump with UEFIToolNE?

9

I did not… I should have…

10

Download the bios update of the corresponding version for your machine, unpack it, take the last 8 MB, that’s the content of the 8 MB chip.

11

I will try it, thanks

12

Sadly it didnt work. Its still in a bootloop (no display, no beep, only leds and fan a few seconds then turn off again)

13

Attach the dumps you used

14

I just removed the first 4MB of the file so its 8MB

Here is the downloaded original:

15

image
image976×1023 20.2 KB

Seems to be wrong version

I’d recommend to work more thoroughly!

16

m1ukt75a?

I used this version because thats the string i found multiple times in the original eeprom

*edit will try something…

17

image
image1640×468 26 KB

But maybe I’m wrong

18

I just found a replacement Mainboard on ebay for cheap. I will wait until it arrives then check whats wrong with mine…

19

I will try m1u68a

  • same behaviour, i hope i didnt brick or break something else on the Mainboard :slight_smile: i will keep it updated when i get the replacement Mainboard

Since i cannot add a new reply because im a new user:
Can’t be, i ever only had one. I just put the BIOS_original2_64.bin at the end of BIOS_original.bin, both of them are from the same machine

20

Seems you’re mixing files from two machines here, the 16 MB dump corresponds to 75, the content you presented for the 8 MB chip (BIOS_original2_64.bin, BIOS_MERGE.bin) corresponds to 68.