T470 bios needed

[Jetro007]

Re: T470 bios needed

I got my t470 20HE corrupted in a bad flash (no boot).
The winbond is a 25Q80JV 8Mb chip, but all I see here is 16Mb files for this bios.

I used Neo programmer and a ch341 to read the bios.

Am i missing something?

is there a way to extract a bin file from a bios update?

[hussaka]

Re: T470 bios needed

Thank you

[andresi]

Re: T470 bios needed

hello,
i try to unlock bios with patcher, but now i cant enter bios. its just blank screen when i enter bios. can you help fix my bios ?

[ravenmx]

Re: T470 bios needed

try and give reply

how i can patch it sr?

[ravenmx]

Re: T470 bios needed

try and give reply

power on but only stay on entering setup ..... and blocked on lenovo logo.. sr

[mazoot]

Re: T470 bios needed

hello , please help this bk have computrace, any can helpme to remove please. thanks you

try and give reply

[ravenmx]

Re: T470 bios needed

hello , please help this bk have computrace, any can helpme to remove please. thanks you

[x16]

Re: T470 bios needed

I have a T470. The Bios is corrupted. It starts, i see logo and then it show the normal screen that there is no system on hard drive.
But when i press F1 to go to bios, the screen is black. I cant go to bios.

Hope you guys can help.

[hoaca388]

Re: T470 bios needed

Thank you,
I tried it, but now the laptop has power but no video or boot up.

Check to see if you have lost any small components around the bios chip (eg capacitors or resistors).

[ricka2021]

Re: T470 bios needed

T470 - Type 20JN

Thank you,
I tried it, but now the laptop has power but no video or boot up.

[hoaca388]

Re: T470 bios needed

okey so how i understand when im using that patcher and flash with new bios file its always stuck on lenovo logo . when i flash bios with password then its works without problems . it can be problem in another bios chip ? there is 2 bios chips . first one u15 and another u49 .

[hoaca388]

Re: T470 bios needed

Hi everyone,
I have Lenovo T470 after bios update, now still boot up but ME version on bios blank and can't shuts down the laptop properly, when shuts down power button led keep flashing yellow and has to force shuts down it. I tried to update the bios still same issue, can someone please help me fix the corrupted bios? I attached this bios dump file.
Thanks

T470 - Type 20JN

[valerix9898]

Re: T470 bios needed

Of course, reuse the patch file to unlock.
https://www.badcaps.net/forum/showthread.php?t=87588

okey so how i understand when im using that patcher and flash with new bios file its always stuck on lenovo logo . when i flash bios with password then its works without problems . it can be problem in another bios chip ? there is 2 bios chips . first one u15 and another u49 .

[ricka2021]

Re: T470 bios needed

Hi everyone,
I have Lenovo T470 after bios update, now still boot up but ME version on bios blank and can't shuts down the laptop properly, when shuts down power button led keep flashing yellow and has to force shuts down it. I tried to update the bios still same issue, can someone please help me fix the corrupted bios? I attached this bios dump file.
Thanks

[valerix9898]

Re: T470 bios needed

hello. thanks. yea already reeded that in this forum . anyway thanks for info

[Markus1741]

Re: T470 bios needed

that bios what you gave me is with password .

Hello just for understanding in no ThinkPad BIOS is stored a password can always be found in the MEC chip.

[hoaca388]

Re: T470 bios needed

that bios what you gave me is with password .

Of course, reuse the patch file to unlock.
https://www.badcaps.net/forum/showthread.php?t=87588

[valerix9898]

Re: T470 bios needed

Flash this file to see if your device will work again or have additional damage.

that bios what you gave me is with password .

[valerix9898]

Re: T470 bios needed

Hello, I don't think the BIOS is the problem, just like every newer Lenovo, the capacitors and resistors are very close to the chip.

We don't know how the BIOS was read out with a clip or by de soldering the chip.

The experienced users in this forum will de solder all the chips in order not to damage anything.

With the clip, resistors are all too likely to be damaged and then nothing works anymore.

See also the two sample images.

so laptop starts but stucks on lenovo logo

[valerix9898]

Re: T470 bios needed

So thank you guys for help . Really happy with that. I checked all morning mb on google with pictures and find there was missing one resistor next to bios . So now laptop works just need try to flash another bios to get rid of password, hope i will get it sorted. Sorry guys i know im new , have skills to solder but im not programming that much and it’s something new for me .