Archive for the Sony VAIO MBX-270 mainboard containing a modification that disables the discrete graphics so the board runs on integrated UMA video only. Technicians apply this kind of DIS-to-UMA conversion when the dedicated GPU has failed and replacing it is not economical, typically by flashing an altered BIOS and sometimes changing hardware straps as well. Read any included notes first and confirm the board is MBX-270. Keep the original firmware dump so the change can be reversed if the result is unsatisfactory.
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 @schematiclaptopramkushwaha. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.