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Thinkpad T440p bios相关问题实战
Lenovo ThinkPad T440p Official BIOS 2.56
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Lenovo ThinkPad T440p Official BIOS 2.56
# Lenovo ThinkPad T440p Official BIOS 2.56 This repository contains the official Lenovo BIOS version 2.56 (GLETA2WW) for ThinkPad T440p, extracted directly from the SPI flash chips. ## BIOS Chips Information The T440p BIOS is stored in two separate SPI flash chips on the motherboard: | Position | Chip Model | Size | File | |----------|------------|------|------| | U49 | Winbond W25Q32.V | 4MB | `4mb_bios_U49.bin` | | U113 | Winbond W25Q64.V | 8MB | `8mb_bios_U113.bin` | ### Chip Locations - **U49 (4MB)**: Located on the RAM side of the motherboard, easily accessible - **U113 (8MB)**: Located near U49, partially covered by plastic housing ## File Contents ### 8MB BIOS (U113 - W25Q64) - Flash Descriptor Region - Intel Management Engine (ME) Region - Required for system boot ### 4MB BIOS (U49 - W25Q32) - Main BIOS Region - UEFI Firmware Volumes - System firmware ## Version Information - **BIOS Version**: GLETA2WW (2.56) - **Release Date**: 2021 - **Source**: Official Lenovo BIOS Update ## Flashing Instructions ### Requirements - CH341A Flash Programmer - SOIC8 Test Clip (1.27mm pitch) - Computer with USB port ### Steps 1. **Power off the laptop completely** and disconnect the battery 2. **Connect CH341A to the chip**: - Pin 1 indicator (dot) on chip aligns with clip pin 1 - Ensure good contact with all 8 pins 3. **Read and backup current BIOS**: ``` # Always backup first! Read from chip -> Save as backup.bin ``` 4. **Flash the BIOS**: - For U113 (8MB chip): Write `8mb_bios_U113.bin` - For U49 (4MB chip): Write `4mb_bios_U49.bin` 5. **Verify after writing**: - Use "Verify" function in CH341A software - Ensure no errors ## Combining Files To create a full 12MB BIOS image: ```bash # Linux/macOS cat 8mb_bios_U113.bin 4mb_bios_U49.bin > full_bios_2.56.bin # Windows (PowerShell) Get-Content 8mb_bios_U113.bin,4mb_bios_U49.bin -Encoding Byte | Set-Content full_bios_2.56.bin -Encoding Byte ``` ## Troubleshooting ### 5 Beeps on Boot - BIOS checksum error - Ensure both chips are flashed correctly - Verify 4MB and 8MB files match ### Boot Loop (Fan spins then restarts) - Flash Descriptor may be corrupted - Re-flash the 8MB chip (U113) - Ensure Flash Descriptor signature (5A A5 F0 0F) is present at offset 0x10 ### No Display / Black Screen - Check chip connections - Verify both chips are properly seated - Try re-flashing both chips ## Warning ⚠️ **BIOS flashing carries risk!** - Always backup your current BIOS before flashing - Ensure stable power during flashing process - Use correct file for each chip (4MB vs 8MB) - I am not responsible for any damage to your device ## References - [Lenovo T440p Support Page](https://support.lenovo.com/) - [CH341A Programmer](https://github.com/niccokunzmann/ch341a-programmer) - [UEFITool](https://github.com/LongSoft/UEFITool) ## License These BIOS files are property of Lenovo. This repository is for backup and educational purposes only. ## Credits - Extracted and verified by community contribution - BIOS version 2.56 (GLETA2WW)
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2026年3月15日 00:21
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