I just received a new XPS 8940 from Dell.  I do not intend to use the pcie drive that was included with Windows 10 so I removed it, but I did test the PC before I removed it and it was working fine. After removing the drive I installed a working sata ssd drive from another PC using the sata 0 connector.  The drive is bootable with Windows 10 installed.  The drive shows up in bios, but I get the "no bootable devices found" error.  Any assistance would be appreciated.