Hello,
I see two Gigadevice chip on motherboard but I am not sure if that could be the BIOS ROM.
Thanks
Sam
I see two Gigadevice chip on motherboard but I am not sure if that could be the BIOS ROM.
Thanks
Sam
Attached Files
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
Ok, I think found it.
Winbond 25Q16JWNIQ.
Following an update Laptop stopped booting. It start with black screen then stops, I guess it's BIOS issue.Attached Files -
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
This flash chip is too low density to be the main bios chip.
Perhaps the bios chip for the local EC controller or wifi / ethernet interface.
The larger Gigadevice chips are probably the main bios flash ICs.Comment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
And attached is what I read from the chip.Now I need to find another BIOS and try to flash it.Comment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
You read those with Pomona SOIC-Clip ? I 've tried a couple of time.. no communication. I have the chip in my reader DB so setup should be ok.Attached FilesComment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
No, the pomona clips (most are clones) are useless for this package.
From memory, believe this is the WSON-8 package. Please search for the datasheet for the device to confirm.
Then, you will need a flash memory breakout / dip conversion board. There is someone in the UK that sells a PCB to support this package but China has clones that should be also ok. In a nutshell, you want to hot air off this flash device -> solder onto another PCB that should offer a DIP (through hole pins) conversion. Then you can R/W/E the flash device.
Be sure to review all details before purchasing / proceeding. This and other forums should mention the full details of this bios device.Comment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
Thank you for the details then I will give up. The PC still under warranty, customer should return it to Lenovo if there is no other option than heat gun to flash it.Comment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
This is the guy with assorted tools. The PCB to DIP is a very simple design but not too many boards out there - Aliexpress has a few.
https://www.cmizapper.com/index.html
Something like this but is from a quick search (not 100% sure if your package is the same size - there are many variations in the marketplace):
https://www.aliexpress.com/item/1005...d=0oXdO1X2cs4u
The real pain is that the zero force sockets are $$$ for the real deal. These are hacked sockets but can work for low volume. I recall having chats with a zero force socket manufacturer and in high volume, they wanted ~$40 USD each. The investment for just the socket MOQ would be more than my car. No thanks.Comment
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Re: Where is BIOS Chip on Thinkpad Gen1 P4 - Model 20Y4S04W00
Thank you. I'll see if I can get one of those for test.Comment
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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...09-02-2021, 04:40 PM -
Hello Community,
I recently tried to change the Batterie on my Omen by HP Laptop 17 an104ng and after putting in the new batterie ([Batterie Link](https://www.amazon.de/7xinbox-17-AN0...&keywords=16%2... -
Long story short:
- dad converted Asus Chromebox CN62 into Windows compatible, with mrchromebox BIOS, years and years ago
- gave the computer to his son a couple years later
- son now decided to revert it to Chrome OS, to sell it as original (re-writing BIOS with the backup one created by his dad)
- too lazy to remove the board from the case, thought a voltage regulator was the BIOS chip (you know... it has 8 legs)
(seems like the story was not that short)
He used alligator clips to read the chip. No luck reading it. Removed chip and placed on a SOC-8... -
Summary of BIOS Whitelist Removal Problem
Problem:
I am attempting to remove the WWAN card whitelist from my Lenovo ThinkPad T560.
Initial Findings:- My current BIOS version is N1KET58W (1.45).
- I have a CH341A programmer and have successfully created two full backups of my BIOS.
- I have the ability to use command-line tools on a Linux machine.
- I attempted to use several automated and manual patching methods on my N1KET58W (1.45) BIOS, including using hex strings. These attempts all failed.
- I concluded that the
08-12-2025, 03:01 PM
Comment