In the era of mechanical hard drives and slower POST (Power-On Self-Test), the boot screen was displayed for only 2–3 seconds. A 120x120 BMP decoded quickly, consumed negligible VRAM, and was "good enough." However, on modern 1440p or 4K displays, this small image gets stretched to grotesque, pixelated proportions.
Warning: Flashing a patched BIOS can brick your Lenovo laptop or desktop. Do not attempt this on a mission-critical machine or a device with a dying battery. You need a UPS for desktops or a fully charged battery + AC adapter for laptops.
Modifying BIOS assets carries risk. Flashing a corrupted or incompatible "patched" BMP can result in a bricked laptop that fails to POST (Power On Self Test). It is crucial to ensure the image format matches the specific model's requirements exactly.
If you are attempting this modification, your image file must be absolutely perfect. The BIOS has zero tolerance for error. Here are the precise specifications verified across multiple Lenovo series (ThinkPad Edge, G570, Z580, K450):
| Parameter | Requirement |
| :--- | :--- |
| Dimensions | 120 x 120 pixels (square) |
| DPI | 72 (default, but ignored by BIOS) |
| Bit Depth | 24-bit (16.7 million colors) OR 8-bit (256 colors) |
| Compression | None (uncompressed) |
| File Header | Standard BITMAPINFOHEADER (40 bytes) |
| Orientation | Bottom-up (default BMP format) |
| File Name | Usually LOGO.BMP, Lenovo.bmp, or OEMLOGO.bmp (case-sensitive on some BIOS versions) |
| Background | Solid black (#000000) is recommended to blend with POST screen borders |
If you take a standard 120x120 BMP file and inject it into a Lenovo BIOS, the flash utility will often reject it with an error like "Image file is invalid" or "Security Verification Failed."
This happens because:
A "Patched" BMP is essentially a raw image data file wrapped in a BMP container that has been doctored to bypass the manufacturer's strict validation logic.
You cannot simply rename a file. You need one of the following patched utilities:
Disclaimer: Modifying BIOS files carries risk. Only use patched tools from reputable open-source repositories. We do not host or distribute copyrighted BIOS files.