Lenovo ThinkPad P50 - Removing the Supervisor Password - NM-A451

[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!

[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.