Most Lenovo utilities look for a specific filename, such as LOGO.BMP or USERLOGO.BMP , placed in the same folder as the flash executable.
The most common way to "patch" the logo is by using the official Lenovo BIOS Update Utility Download and Extract: lenovo oem logo bmp 120x120 patched
If you are "patching" the BIOS to change the startup splash screen (the logo that appears before Windows starts), the requirements are much stricter. Image Specs Resolution Most Lenovo utilities look for a specific filename,
: Historically required to be 16-color or 16-bit depending on the specific BIOS generation. File Size : Typically must be under 30KB to 60KB total. such as LOGO.BMP or USERLOGO.BMP
Always have a hardware programmer or a recovery USB drive ready.