Lenovo Thinkpad P50 Bios Corrupted

[bannermast]

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...

[bannermast]

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.

[hoaca388]

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.

P50 Laptop (ThinkPad) - Type 20EN

Srial number : PC0EWVAN

[bannermast]

P50 Laptop (ThinkPad) - Type 20EN

Srial number : PC0EWVAN

After replugging the CMOS battery and the switch next to it, I am glad to say that the BIOS file worked. Thank you so much, you just made my day.

[bannermast]

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

[peste]

post merged..

[MartyC]

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!

[SMDFlea]

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!

Thread merged. Post your bios backup.

[MartyC]

Thread merged. Post your bios backup.

Hi, I'm a complete noob to bios hacking, have just received a CH341A today and will try to extract the corrupted (?) bios tomorrow, hopefully. Will this help?

[MartyC]

Thread merged. Post your bios backup.

Hi again!

I managed to connect the CH341 and read the bios. Attached is the file.

[Markus1741]

Hi again!

I managed to connect the CH341 and read the bios. Attached is the file.

Hello you can try this new file ....

[MartyC]

Hello you can try this new file ....

Thanks so much! That worked great! Now I have my lappy back. So happy

[mouse1972]

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-04TPLT

[hoaca388]

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-04TPLT

P50 Laptop (ThinkPad) - Type 20EQ

[mouse1972]

Rewrote the bios, but nothing changed. The power button blinks 3 times after pressing and nothing happens

[hoaca388]

Rewrote the bios, but nothing changed. The power button blinks 3 times after pressing and nothing happens

Check hardware

[mouse1972]

Before reflashing it was 100% working laptop😭

[Markus1741]

Before reflashing it was 100% working laptop😭

Hello you can try this files ma be it helps good luck ....

[mouse1972]

Hello you can try this files ma be it helps good luck ....

Thanks for your help. Everything worked. The laptop came to life and even works normally. I hope this will last for a long time.

[yassin1913]

Hellooo can someone please help fix this corrupted bios..When I boot it without RAM it beeps 1 3 3 1 times
type 20FK
SN>R9-0N3K6A 17/03