Embedded controller firmware for the Toshiba Satellite L740 and L745 series, supplied as a 512 KB ROM image. The EC handles power-on sequencing, battery charging, keyboard and fan control, so a corrupted EC is a common cause of no-power or no-charge faults. Write it with a programmer to the EC flash or the chip specified for your board, after saving the original contents first. Make sure the image length matches the chip capacity and that the board really is an L740 or L745 before writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cidschematicandboardviewofficial. Enginerys does not host this file.
How to open a .rom file
A BIOS image as shipped by the vendor (commonly AMI) — often the BIOS region only, without descriptor or ME.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →