biosbin.zip
Lenovo U550 LU15 UMA — motherboard 09253-1 / 48.4EC02.011.
The board was manufactured by Wistron for Lenovo. Wistron board numbers are 5–6 digits plus a revision, so you can confirm it on the PCB silkscreen. This listing is for revision 1.0; another revision of the same board can need a different file.
From the title: integrated (UMA) graphics.
- BIOS (full SPI chip dump, .bin)
- EC / KBC firmware, if the board uses a separate EC chip
- Schematic (PDF)
- Boardview (.brd / .bdv / .cad)
Usually needed when the laptop powers on with a black screen after a BIOS update, is stuck in a boot loop, or is locked with a BIOS password.
Before flashing, always read and save the original chip. It holds the serial number, UUID, MAC address and ME data for that exact machine.
Have a tested file for 09253-1? Reply below and help the next technician. Looking for something else? Search all files in the File Finder.
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