How can I revive an Intel SSD 520 that has died. Can warming it in an oven do it as rumored? And how if so. It has my operating system on it so now my desktop is non functional.
Sorry, it appears that the SSD is toast. It happens eventually to SSDs and USB flash drives. Your external dock will not go to waste, however. Every time you have a problem with an SSD -- and you will -- use it to determine what the problem is.
By the way, did you use Disk Management (right-mouse on Computer, select Manage, then select Disk Management) with the external dock? If you only use Computer, you only see devices with partitions. Disk Management sees all working drives.