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Lenovo T480s ET481 NM-B471 bios request
Hello friends, pls i need this Bios, mine is corrupted
put the backup. thanks in advance
ET481 NM-B471 Rev 1.0Comment
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lenovo t480s
NEED EC BIOSComment
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RULES UPDATE for BIOS requests/offers AVOID BANNING, READ BEFORE POSTING
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Thinkpad T480s:
Type: 20L7-001NGE
S/N: PC13XSFF
Motherboard: ET481 NM-B471
Bios Chip: MXL12873F
I have bought the laptop as "broken". When turning the Laptop on it plays a beep melody. "Lenovo PC Diagnostics" App identified the beep melody as: error code 0285 - This error code refers to "TCG-compliant functionality-related error(might be the TPM initialization failure".
As mentioned on this Reddit Thread to get a CH341A and flash the BIOS.
Therefore I have used the CH341A and AsProgrammer 2.0.4. After a few attempts I was able to make 3 identical readings of the Bios Chip.
As this laptop did not have any working bios from the beginning, I would need a .bin from a working dump to flash the bios.
Thank you very much for the assistance in advance.Comment
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Hello here are two new files. And yes, your original file is corrupt.
Either one should work.
Just be careful with the resistors when programming with a clip.
Otherwise neither works.
Lenovo_T480s_outimage.bin is one from my archives.
Bios_T480s_new_outimage.bin is your with new BIOS region.
Good luck ....Comment
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Hello Markus1741, thank you very much for the fast reply. I used your Bios_T480s_new_outimage.bin and at least it somehow worked. It shows at least the Lenovo Startup logo after that it shows me two errors which you can see at the screenshot below.
When clicking F1 to continue it asks me for a supervisor password? Did your bios dump/image had one? If so, can you forward it to me by any chance?
If not then I will try this method from this Thread:
https://winraid.level1techs.com/t/ne...-bios/38125/15
“A user over at badcaps.net 6, where Sweet Kitten linked the first image from, has build a LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal 95.
So I downloaded that tool and pretty much followed the instructions lined out in the thread using the
unbricked_old.bin that @lfb6 had uploaded. So basically:
1. Run the tool on the unbricked image
2. Flash that image to the chip
3. Boot up and follow instructions ← this gets rid of the supervisor password
4. Flash the original unbricked image to the chip again
5. Factory reset BIOS (which is now accessible without a password!)
It does look a bit shady though, ngl, so I'm not sure yet what to think of it and if it didn't introduce some unwanted guests or something.
But: It did work. After that, the machine did boot normally without any errors or warnings. Bonus: BitLocker was still in place and accepted my old password, so I was able to recover everything and everything is working as if nothing ever happened!”
Comment
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The file Bios_T480s_new_outimage.bin is your original uploaded file that I repaired.
If you don't know that your notebook has a supervisor password, I certainly don't know. But it's also nice that it worked.
Lenovo hasn't stored a password in the BIOS chip for ages but always in the EC chip MECxxx or ITExxx or Nuvotonxxx
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Hello
Mb : NM-B471 Rev 1.0
Notebook Model : 480S
i need patch my bios please help meComment
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Hey guys!
Got his T480 bricked, turns on , no post. seems bios related.
Here's the original backup.
Board: ET481 NM-B471 rev 1.0
Laptop: Lenovo T480s
Type: 20L8-SBT00
SN:PC-12ZMY5
Could someone help me getting my dump fixed?
Thank you!!Comment
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Thank you hoaca388!
Laptop turn on and POST OK
BUT
touchpad is not working
Could it be related with bios?
It was working before it got bricked.
Comment
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hello people,
I have a problem with a Lenovo ThinkPad T480s, when I plug in my WiFi card, this error pops up
"Unauthorized network card is plugged in - Power off and remove the network card"
I am asking for your help. The original bios is attached
motherboard: ET481 NM-B471 Rev: 1.0 2017-10-30
TYPE: 20L7-001NMZ
SN: PF-0YRRTA 18/03
Processor I7-8gen
Attached FilesComment
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Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Every donation made will go towards server fees and maintenance costs.Comment
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Yes it has his WIFI card in it, the problem came when I cloned the OS system from one T480s to another. When I transfer from this transfer card from a non-cloned laptop it works normally on this one where the problem is :/Comment
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Please help, erased BIOS chip instead of Thunderbolt, so I don't have backup. T480s Type: 20L8-002WSC PC-0Y68L6Comment
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