Flashing original BIOS not working

[cdzo72]

Hello to everyone!

I bought a used Lenovo P500 Touch IdeaPad that someone flashed a modded Insyde BIOS to so they could use a different WiFi card BUT for some reason that BIOS has affected the bluetooth funcionality.

So when I try to flash a bios file from Lenovo from Windows I get the message that the installed BIOS has the same version number as the file I am trying to flash, so the flash stops.

Also, I have tried to flash the factory BIOS using the Insyde recovery method but I'm not seeing any activity from the computer. Instead of using the Windows button I read somewhere that using the Fn button works and it seems that the key combination is Fn + B BUT I can't see where the laptop is doing anything... This laptop has the battery built in so I can't completely remove power unless I take it apart, which is no big deal if someone tells me it must be done this way. Procedure is also a little different... if I press the FN and B key, connect power and hold the power button, nothing every happens... I have to press the Fn + B buttons, connect the power and then press and release the Fn + B buttons and then I hear the fan kick on BUT the only LEDs that light are the one on the power button and the power LED at the front, the keyboard backlight does not light.

Soooo what I'm looking for is a tool that will flash the original BIOS from within windows or DOS (instructions for DOS please) or someone to verify or correct my BIOS recovery procedure.