Lenovo Thinkpad P50 Bios Corrupted
Hello, it seems to me that my thinkpad P50's BIOS is corrupted. I tried to boot it up and the power button would only blink 3 times green. The serial number is missing from the bottom of the chassis so I'm not sure what to do. I hope it's not the motherboard that's broken...
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Update: I seem to have made marginal progress. When I boot it without RAM it beeps 1 3 3 1 times, without RAM the fans and keyboard just turn on then off after a few seconds. -
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Hello,
I've been trying to remove the BIOS Password from my Thinkpad P50, and I have tried to use the autopatcher provided in this forum, however it doesn't seem to work. When I flash the autopatched BIOS to the computer it just beeps 5 times twice then turns off. I've made sure to detach the CMOS battery and held the tamper switch down with tape so I'm not sure what else I can do. One thing I did notice is that when I use my CH341A to verify the hex code for either patched or unpatched BIOSes it seems to mismatch after trying to boot; I assume that's the BIOS self healing? Whenever I flash the original BIOS the computer works as expected. I've attached my original BIOS, the autopatched version, and a screenshot of when I boot with the original BIOS. If anyone could help me out I would greatly appreciate it.
P50 Laptop (ThinkPad) - Type 20EN
Srial number : PC0EWVAN
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Lenovo Thinkpad P50
Model: 20EQS48H00
Serial: PC0MLZBV
Hi, I'm requesting the bios for my P50. I messed up badly after an Ubuntu Studio install/update and now when I hit the power button it just flashes the keyboard lights briefly, and does nothing else. No post, fans or screen. I searched the forum and found other firmware posted, but I'm not sure they're compatible. Thanks for any help!Comment
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Hello friends! My P50 does not respond to the power button. It blinks 3 times and nothing happens. I think the problem is in the BIOS. Can someone help me?
Type 20EQ
Serial MJ-04TPLTComment
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Rewrote the bios, but nothing changed. The power button blinks 3 times after pressing and nothing happensComment
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Before reflashing it was 100% working laptop😭Comment
Will this help?
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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 -
This specification for the Lenovo ThinkPad P50s Ultrabook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the P50s boardview and P50s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 06:58 AM
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This specification for the Lenovo ThinkPad P50s Mobile workstation can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the P50s boardview and P50s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo...09-06-2024, 06:00 AM
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This specification for the Lenovo ThinkPad P50s Mobile workstation can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the P50s boardview and P50s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo...09-06-2024, 05:54 AM
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Hello everyone,
First, the data in brief:
Manufacturer: Lenovo
Model: ThinkPad L15 G3 21C3-0016GE
motherboard: LG4 LT5 ADL RT UMA MB 8L - 448.0PZ26.0011
IC Bios 1: MX77L25650F
IC Bios 2: MX25L25673G
EC Chip: NPCX997KAABX
So far I've been a silent reader, but now I need your help
I bought a laptop. The seller said the bios was locked. I was looking for a way to remove this ban.
I then got the CH341A and pulled the corresponding files from here https://www.badcaps.net/forum/troubl...evices-and-ele...
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