Thread Necromancy!I have been experiencing this exact same issue with this motherboard recently and I think I know what causes this boot cycle issue and error code 19.I recently went and installed a compatible nand ssd for the mPCIe wifi/BT combo add...
What Jeff says is correct, however I encounter this problem when fiddling about with my UEFI clocks and the 4-way optimisation.The only way I've found to stop this happening is to Load Optimised Defaults in the UEFI and then manually start restoring ...