This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.

There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as...

Hi

I have a very strange issue with the BIOS SPI chip of an ASRock B650M PRO RS motherboard.
The SPI chip is an Winbond 25Q256JWEQ model (1V8).
The motherbaord doas not POST - it lits only CPU and DRAM EZ Debug Leds, and stays that way forever.
The Flashback function of the motherbaord is also not working, despite all instructions followed correctly - I'm 100% sure of this.

I have then desoldered the chip, backupped the contents, and tried to earease the chip in order to program stock image, but the chip is locked by status registers SREG2 (TB) and SREG6...

Common SPI bios chip programming Questions and Answers
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Q: I have a bios request,i can`t post my backup as i can`t read from the chip.

A: If you can`t read from it how do you expect to write to it ?.

Q: Why is my bios chip unreadable ?.

A: The programmer is faulty or has a worn or broken zif socket.

The USB cable is frayed,connector pins worn or some other physical damage.

Not enough amperage or voltage to power the programmer properly.

Bad...

Hello All,

I tried to read the the BIOs chip(GD25B127DSIG) on the mainbord of an HP EliteDesk 800 G6 mini, because the BIOs had an Admin Lock and I got the "HP Endpoint Security Problem" Screen at every startup which is not very useful when I want to use the PC as a Compute Unit for my home media system somewhere in the cellar, so it should perform a restart without any interactions.

I only have the CH341APro Programmer available and did the 3V hardware Mod on it before I tried to read the BIOS chip.

I read the Chip on board 8 times (with power...

Hi there,
I need some help reverse engineering a BMS chip from a battery for an xx30 thinkpad. The Laptop uses a challenge-response type of system to verify if a battery is genuine:
The laptop writes four bytes to 0x3C and then reads 0x3C. The battery responds with "Lenovo JapanXXXX", with the Xs corresponding to four response bytes. For example "0xDC 0x42 0x5B 0x82" to BMS => "Lenovo Japan0x9F 0x76 0x97 0x2E" from BMS.

What I know so far:

• It's an 51F51 BMS chip based on the R2J24020F group. Karosium has already figured out how to dump

...