Msi ge72 won't boot

[AYS27]

Hi my ge72 laptop starts up to a black screen and no boot up
I did a full power flush and I unplugged and plugged the cmos battery but to no result
I suspect that it's corrupted bios
How can I repair or do a recovery on the bios ?
thanks

 

[rgd1101]

MERGED QUESTION
Question from AYS27 : "Msi ge72 won't start"

So yesterday I replaced my keyboard and everything was working fine for about 12 hours then I went to sleep and woke up this morning and the laptop turns on then off a second later i tried changing the ram placement and that made it turn on but the screen was off and the hard drive light was off too
I read on some forums that it might be a corrupt BIOS and that I'd have to change the whole thing any tips ?