lenovo thinkpad P50

[sonsy]

Greetings .
Can someone help me fix the bios on lenovo Thinkpad P50 type 20EQ-S20D00.
With the original bios, the laptop cannot turn on at all, and does not turn on any lights. With a bios dump from another laptop (same type), everything works normally, the only thing that is problem is a delay in turning on the screen for about 20 seconds after pressing turn on button.

[SMDFlea]

Greetings .
Can someone help me fix the bios on lenovo Thinkpad P50 type 20EQ-S20D00.
With the original bios, the laptop cannot turn on at all, and does not turn on any lights. With a bios dump from another laptop (same type), everything works normally, the only thing that is problem is a delay in turning on the screen for about 20 seconds after pressing turn on button.

Thread merged. Please read the comment above https://www.badcaps.net/forum/troubl...05#post3339405 post the serial number

[sonsy]

Sorry, here it is:
SN: PC-0DQ6KX
MAC: C85B761F51C7
type 20EQ-S20D00

[Markus1741]

Sorry, here it is:
SN: PC-0DQ6KX
MAC: C85B761F51C7
type 20EQ-S20D00

Try ...

[sonsy]

Try ...

Thanks for the effort.
It doesn't work with this bios. it turns on for 3 seconds and then turns off. So every time I press the power button.

[SMDFlea]

Greetings .
Can someone help me fix the bios on lenovo Thinkpad P50 type 20EQ-S20D00.
With the original bios, the laptop cannot turn on at all, and does not turn on any lights. With a bios dump from another laptop (same type), everything works normally, the only thing that is problem is a delay in turning on the screen for about 20 seconds after pressing turn on button.

post a link to or attach the bios that worked with the delay

[sonsy]

post a link to or attach the bios that worked with the delay

Thanks!

[Markus1741]

Thanks!

Okay your file ME Region clean ...

[sonsy]

Okay your file ME Region clean ...

still the same as last time, it turns on, lights up, and turns off after 3 seconds.

[mariusdumi]

Hi, I have a ThinkPad P50 I bought used on eBay, with an invoice from the seller. The seller doesn't know the password, and I need to remove the BIOS password. I have the CH341 flasher purchased from Amazon along with the 8-pin clamp. Can you tell me how to extract the BIOS and then decrypt it?
I also need to identify the correct chip to read.
MB model: bp500 nm-a451 rev 1

Thank you for your attention

[peste]

post merged..next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..

[danito]

Hi, I have a ThinkPad P50 I bought used on eBay, with an invoice from the seller. The seller doesn't know the password, and I need to remove the BIOS password. I have the CH341 flasher purchased from Amazon along with the 8-pin clamp. Can you tell me how to extract the BIOS and then decrypt it?
I also need to identify the correct chip to read.
MB model: bp500 nm-a451 rev 1

Thank you for your attention

you have everything you need here:
https://www.badcaps.net/forum/troubl...ssword-removal

[DanielCZ]

Hello,

I need help removing the Supervisor Password from a Lenovo ThinkPad P50.

**Laptop information:**

- Model: Lenovo ThinkPad P50

- Motherboard: BP500 NM-A451 Rev. 1.0

- BIOS chip: Winbond W25Q128BV (16MB, SOIC8)

- BIOS dump size: 16,777,216 bytes (exactly 16 MB)

**What I did:**

1. I successfully read the original BIOS using a CH341A programmer with a SOIC8 clip.

2. I used lenovo_autopatcher 0.2 to create a patched BIOS.

3. I successfully uploaded the patched BIOS to the chip (verified using NeoProgrammer).

4. The laptop turns on, but nothing is displayed on the screen

**Current behavior:**

- Power LED is on (green)

- LEDs on the keyboard are flashing (NumLock, CapsLock, Mute, Speaker)

- Fans spin for a few seconds, stop, then spin again after 30 seconds

- Fans run for about a minute, then stop

- No display output (black screen)

- No POST beeps

**What I've tried:**

- Waited 5+ minutes for boot

- Checked all connections (RAM, LCD cable, SSD)

- All components are connected correctly

- Wi-Fi card is NOT installed (missing)

**Question:**

Can a missing Wi-Fi card prevent a patched BIOS from booting?

Or is there a problem with the autopatcher for this particular model?

I have the original BIOS dump backed up and can restore it if necessary.

Could someone please help me:

1. Create a working patched BIOS for this model, OR
2. Advise what might be causing the boot failure

**Attached files:**

- original_bios_locked.bin (16,777,216 bytes)

Thank you very much for your help!

[peste]

post merged..next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..

[Markus1741]

Hello you can try this new build file ...
In your original file is this error in UEFI Tool 72 ...
FfsParser::checkProtectedRanges: Phoenix protected range [A30000h:E70000h] hash mismatch, opened image may refuse to boot

That could be a possible error; unfortunately, I don't know for sure either.
It doesn't appear in my new file.
Just try it; there's not much else you can do unless someone else has a suggestion.