Lenovo Thinkpad T420 H0223-4 (clean me) tested ok

If your Lenovo ThinkPad T420 with motherboard H0223-4 is facing issues such as no display, boot loop, or instability, this tested BIOS firmware with cleaned Intel ME region can help restore proper system functionality and reliability.

🔧 Included Files

✅ Main BIOS dump (.bin) – Clean, tested & stable
✅ Intel ME (Management Engine) region cleaned and rebuilt
✅ Fully compatible with Lenovo ThinkPad T420 – H0223-4 board

🧩 Fixes Common Problems

No power or no display
Boot loop or stuck on Lenovo logo
Random shutdowns or freezes
BIOS corruption or Intel ME errors
Fan, thermal, or power-management issues caused by ME faults

⚙️ Technical Info

Model: Lenovo ThinkPad T420
Board ID: H0223-4
Intel ME: Cleaned & reinitialized
Firmware: Main BIOS
Status: ✅ Tested OK on a working unit
Format: .bin – ready for flashing using CH341A, RT809F, EZP2019+, or similar SPI programmers.