[Request] Lenovo T540p (GMETxxWW) BIOS Unlock

[siroosec]

Hi!
I got a Thinkpad T540p, and its bios got corrupted. When I took it to warranty, they said they have to change the MB and since I have tinkered with it the warranty is voided.
It looks like I can't update the bios by bootable disc or usb, since the PC resets in less than 1 sec. (If there is a way it would be awesome!) So I think I have to flash the bios using external programmers. I don't care about SLIC or any anything since I'm going to install Ubuntu on it anyway, I just want to be able to boot it!

The place I went to program it for me, said they don't have bios files for programming the chips, which should be a 4MB and a 8MB .bin or .rom file.
If someone could help me find them I'd be extremely grateful. I'm just a computer science student who used most of my savings for tha, so it means a lot to me.

Also do they need to be modified since T540p uses a bios certification protection?

Specs: i7 4800m, Nvidia, 730m
Official bios link: http://support.lenovo.com/us/en/downloads/ds038148

Also someone posted some backups from his T540p on the forums, I don't know if it's ok to use them or not. (I can't get backup from my own laptop since it doesn't boot at all.): https://www.bios-mods.com/forum/Thread-R...s-GMET66WW

These are my hardware backup files from the dead laptop. I'd appreciate if anyone can see what's wrong with them.

4MB chip
8MB chip

[BDMaster]

These are my hardware backup files from the dead laptop. I'd appreciate if anyone can see what's wrong with them.

4MB chip
8MB chip

Even a hint at where the corruption is would be great.
Or where I can find the backups.

Ok friend,
I will give a look (You said about T540p Dumps It's a Bios Backup only).
I didn't found a schematics for your laptop so if possible to get a MoBo photo
where are Firmware Chips (near Chipset) abd get complete Eeprom Chips name ?
Regards

Ok friend,
We have two Chips and two files :

4 MB File is Bios Chunk and I can Regenerate !
8 MB fIile is EC chunk and I haven't a Dump (It'possible to get only by HW SPIPGM) I cannot Regenerate !

So if It's bad Bios Dump We can Recovery your laptop otherwise only using another Dump can do the miracle or
changing MoBo at Service.
I will upload the 4 MB file Regenerated (a new working Bios injected)
Regards

[siroosec]

http://www.myfixguide.com/manual/lenovo-...sassembly/

I could find this so far.
I'll keep asking for chip names. I'll get it opened if I couldn't in 1-2 days.

Thanks a lot!

[BDMaster]

http://www.myfixguide.com/manual/lenovo-...sassembly/

I could find this so far.
I'll keep asking for chip names. I'll get it opened if I couldn't in 1-2 days.

Thanks a lot!

I sent a file in PM, have You tried It for 4 MB Chip ?
Regards

[jagman]

Make: Lenovo
Model: T540p (20BECT01WW)
Screenshot: Here
Bios: Here (Used Bios Backup Tool V2)
Results of BACKUP_Tools14a: Here (But nevermind. It complained of needing to be run as admin, even though I did.)

[BDMaster]

Here You go :

http://rghost.net/7P4FjCP2G

let me know
Regards

Donate to me for my work and time . . . look into my Signature

[jagman]

Here You go :

http://rghost.net/7P4FjCP2G

let me know
Regards

Donate to me for my work and time . . . look into my Signature

Really appreciate your time with this. I've prepped a drive (Rufus is a time saver. Found it a while back myself.)

That said, should I remove BIOS passwords or anything before flashing?

I went ahead and removed all the passwords. Figured that it didn't take too long.

I got an error when running the batch file. I powered down the computer instead of pressing enter. Wanted to get your take on it.

Here are updated results of BACKUP_Tools14a. Seemed to actually run now.

[BDMaster]

Update from pure DOS with USB-bootable stick
See how to make one here:
http://www.howtogeek.com/136987/how-to-c...usb-drive/

https://app.box.com/s/w8xgrhpwf2nx0kamfkc0

Use RUFUS tool to prepare the USB Stick DOS Bootable !

Copy the "Modified" folder contents into the stick and boot in DOS mode and
Run Flash.bat to update.

Don't touch Video Settings or Disable Video Card It will Brick laptop !!!

Please post results.
This mod for your PC only!!!

[BDMaster]

Then You have to "PRESS ENTER TO CONTINUE" It will use a tool to bypass the
error 28 !
So press enter and continue to flash !
Let me know
Regards

[jagman]

Then You have to "PRESS ENTER TO CONTINUE" It will use a tool to bypass the
error 28 !
So press enter and continue to flash !
Let me know
Regards

I pressed enter and the result is this.