Flashing a T480s BIOS

[CryingInPublic]

Hello,

I have some electronics experience, but I haven't flashed a BIOS chip before. If someone doesn't mind answering a few basic questions I would really appreciate it. Which chip on the T480s system board do I need to dump/write to? Also, which programmer should I use (CH431a, TL866II plus, etc.)?

As far as I can tell, it's either U49 (25Q128JVSQ, SOIC8) or U23 (MEC1663, BGA). If it's U23, do I interface with it using the JTAG connector next to it?

Thanks in advance!

P.S. I hope I've put this in the correct sub-forum

[LenBios]

Re: Flashing a T480s BIOS

Hello,

I have some electronics experience, but I haven't flashed a BIOS chip before. If someone doesn't mind answering a few basic questions I would really appreciate it. Which chip on the T480s system board do I need to dump/write to? Also, which programmer should I use (CH431a, TL866II plus, etc.)?

As far as I can tell, it's either U49 (25Q128JVSQ, SOIC8) or U23 (MEC1663, BGA). If it's U23, do I interface with it using the JTAG connector next to it?

Thanks in advance!

P.S. I hope I've put this in the correct sub-forum

Hi,

U49 (25Q128JVSQ, SOIC8) is the chip, read the chip 2-3 time compare it and save, use autopatch and follow the instruction..... and write the original Bin back all is done.
it can be done with CH431a, TL866II plus..

[CryingInPublic]

Re: Flashing a T480s BIOS

Thanks! I'll get myself a programmer and let you know how it turns out.

[trili]

Re: Flashing a T480s BIOS

Hi,

U49 (25Q128JVSQ, SOIC8) is the chip, read the chip 2-3 time compare it and save, use autopatch and follow the instruction..... and write the original Bin back all is done.
it can be done with CH431a, TL866II plus..

Hi, is U49 same for T470s?

[bigsqueaks]

Re: Flashing a T480s BIOS

Found this page while trying to use autopatcher with a t480s. The U49 25Q chip is the one you're looking for. It's located next to the RAM expansion slot, so close that an 8-pin clip has almost no clearance, but it will fit. There are other chips to be confused with so make sure you find the right one.

I also wondered if it was working because the screen was blank for a bit longer than I expected, but it did and I'm very happy.