MX300 not recognized after restart, but fine after shut down and start up. Using as boot device

Bit Baby

MX300 not recognized after restart, but fine after shut down and start up. Using as boot device

Put a new 525GB MX300 in an older HP desktop (p7-1074).  Firmware is up to date on the SSD, BIOS is set to AHCI.  After restart the drive is not recognized and I just get the boot device screen, but if I power it off and back on it's fine.  Tried several tricks I found online for 'disappearing SSD syndrome', but none have worked.  Just wanted to check here before returning to Amazon for replacement

 

atw