When you say it doesn't boot, what does it do (and say)?
When you see it not work, have you tried manually booting from it using the F10 menu?
Have you upgraded to the latest BIOS release? If not, I suggest that you do so. It is available here: Download BIOS Update [WYLPT10H.86A].
Ultimately, you may have to try using a replacement SSD to see if the existing SSD is the culprit...