AMI BIOS doesn't see SSD (sometimes)

[aleritty]

Hi!

Maybe someone can help me solve this problem that is very strange for me:

When I turn off my laptop I need it to "cooldown" at least 20 minutes without power cord.
If I wait everything is ok, the laptop usually (but now every time) boot up.

I I don't wait, the laptop cannot see my SSD (like no ssd is plugged). This is not an SSD trouble, I tried 4 SSD and 2 mechanical HDD, same problem.
   

I'm not the only one that have this trouble as you can see here:
https://forum.toshiba.eu/showthread.php?...-L50-A-1EH


My laptop is a Toshiba Satellite L50-A-1D6 (PSKK6E)

My bios version is 1.90 (this file http://support1.toshiba-tro.de/tedd-file...153531.zip )
The bios is AMI optio (I don't know which version, maybe you can help me identify it).
   

dmidecode tells me that this is smbios-2.7 dmi-2.7
with vendor toshiba and not much more.

Also I run only linux (ubuntu 16.04) actually so I cannot use windows flashing tools, but if it's needed I can install win7 just for resolve the trouble.

Thank you in advance!