I'm trying to boot my computer after a few days of inactivity. My primary boot drive, a 250GB Samsung EVO SSD, cannot be recognized by BIOS. The secondary HDD I have hooked up is recognized (but is not set up to boot), as is the CD drive I have installed, leading me to believe it's not an issue with the BIOS itself. However, I've tried hooking up the SSD in question to both my laptop via a SATA-USB adapter, as well as another computer I have via direct SATA, and in both cases the drive is recognized by device manager ("This device is functioning properly") and the other computer's BIOS. I've also tried cleaning the contacts and swapping out cables, but to no avail. Any suggestions on how to diagnose what's wrong? The SSD, along with the rest of the hardware, is only 3 years old.