[REQUEST] Lenovo ThinkPad T450(s) (JBETxxWW) BIOS Unlock

[Dudu2002]

I have a little problem whit my t450 i buy 4g card lte and put in my t450  have error massege " 1802: Unauthorized network card is plugged in card (8087/0911). Power off and remove the network

System is halted "  it can't boot to windows , have any body have this issu

Hi
All mods are personal, need your bios dump

Thanks very much  but how can i do ?  how can i dump my bios ? it s can fix this error

You need SPI-programmer+SOIC8 clip

[mindre]

Hello,
I have Lenovo Thinkpad T450 and recently changed my LCD display with new IPS screen. But unable to control brightness in windows.
Please help me to remove whitelist for display and wifi. And unlock advanced menu too, and please remove that beep sound at startup too.

This is my factory BIOS: https://mega.nz/file/y2xRDCSD#fh1kQnYy9s...6wuVndIqt8
BIOS version: JBET73WW (1.37) 2019-08-14
Embedded Controler version: JBHT17WW (1.04)
Model is: 20BUS4S900 (Lenovo T450)

Thank you.

[deepTeNk]

Hello,
I have Lenovo Thinkpad T450 and recently changed my LCD display with new IPS screen. But unable to control brightness in windows.
Please help me to remove whitelist for display and wifi. And unlock advanced menu too, and please remove that beep sound at startup too.

This is my factory BIOS: https://mega.nz/file/y2xRDCSD#fh1kQnYy9s...6wuVndIqt8
BIOS version: JBET73WW (1.37) 2019-08-14
Embedded Controler version: JBHT17WW (1.04)
Model is: 20BUS4S900 (Lenovo T450)

Thank you.

Hi
I try make mod. Check your messages

This mod for this notebook ONLY !!!

[mindre]

Hello,
I have Lenovo Thinkpad T450 and recently changed my LCD display with new IPS screen. But unable to control brightness in windows.
Please help me to remove whitelist for display and wifi. And unlock advanced menu too, and please remove that beep sound at startup too.

This is my factory BIOS: https://mega.nz/file/y2xRDCSD#fh1kQnYy9s...6wuVndIqt8
BIOS version: JBET73WW (1.37) 2019-08-14
Embedded Controler version: JBHT17WW (1.04)
Model is: 20BUS4S900 (Lenovo T450)

Thank you.

Hi
I try make mod. Check your messages

This mod for this notebook ONLY !!!

Thank you bro, much appreciated.
I tried but unfortunately it didn't work, It failed with message, "VERIFYING FLASH, A flash failed at address with offset .......... " and laptop didn't bootup so, i reflashed with original BIOS.

[deepTeNk]

Is the original dump flashed normally? Did you use a programmer with a clothespin or desolder the flash drive?

[mindre]

Is the original dump flashed normally? Did you use a programmer with a clothespin or desolder the flash drive?

Hello Bro,
Yes it is original dump from the BIOS chip with USB SPI CH341A without desoldering.

Thank you.

[deepTeNk]

Is the original dump flashed normally? Did you use a programmer with a clothespin or desolder the flash drive?

Hello Bro,
Yes it is original dump from the BIOS chip with USB SPI CH341A without desoldering.

Thank you.

Sorry, my English is not my native language.
1. What software do you use for the CH341A? Not the one that was included, I hope?
Use alternative programs SiberiaProg, AsProgrammer or NeoProgrammer
2. Flash programming without soldering from the board = unpredictable result. In-circuit programming is very unstable.
3. Are you choosing the chip model correctly from the list?
P.S. recently, a person flashed Lenovo B590 without soldering, it was possible to flash only once from the 20th with disconnecting and reconnecting the clothespin.

[Smart_Tech]

T450s want to add LCD panel so brightness controls work:
LP140WF3(SP)(D1)
Thank you!

You're looking to add the **LP140WF3-SPD1** LCD panel to your **Lenovo ThinkPad T450s**, likely as an upgrade or replacement to ensure brightness controls work properly.

Here's what you need to know:

### ✅ **Compatibility of LP140WF3 (SP)(D1) with ThinkPad T450s**

* **Yes**, the **LP140WF3-SPD1** is **compatible** with the Lenovo **T450s**.
* It is a **14" Full HD (1920x1080) IPS** panel — commonly used in upgraded T450s models.
* Many T450s units shipped with 1366x768 TN panels, which do not support proper brightness controls or color quality.

### 🛠️ **To Ensure Brightness Controls Work**

1. **BIOS Whitelist:**
T450s does **not have a strict BIOS panel whitelist**, so custom panels like the SPD1 version generally work **without flashing a custom EDID**.

2. **Use the Correct eDP Cable:**

* Make sure you're using the **2-lane eDP cable** required for FHD panels.
* Part Number: **00HT741** (or 00HN878 for touch models).
* If you're upgrading from an HD panel, **you *must* replace the cable** to support the FHD screen properly.

3. **Backlight Type:**

* The SPD1 variant uses **PWM-controlled LED backlighting**, and brightness is handled via the **Intel GPU driver**.
* Make sure to use the **Intel Graphics Driver from Lenovo's support site**, not just the generic Intel one.

4. **OS-Specific Fixes (if needed):**

* **Windows 10/11**: Should work natively after driver update.
* **Linux**: May need kernel parameter tweaks (`acpi_backlight=native` or `vendor`) if brightness control isn’t functional.

### 🧩 Other Panel Variants in the LP140WF3 Series

If you're sourcing the panel, **stick to SP(D1), SP(D2), SP(D3)** — all are good IPS options with working brightness and compatibility with T450s.

### 🔧 Summary of What You Need

| Component | Part / Info |
| --------- | ------------------------------------------- |
| LCD Panel | LP140WF3-SPD1 (FHD IPS) |
| eDP Cable | 00HT741 (non-touch) or 00HN878 (touch) |
| Driver | Lenovo Intel Graphics Driver (Win/Linux) |
| Tools | Plastic spudger, small Phillips screwdriver |