This is an issue with your Motherboard and it likely needs to be replaced. Before you go ordering a new one or trying to get a repair order requested, try running Startup Repair and if that doesn't work, try re-installing the OS. If either don't work then the MOBO needs replacing.
If you do manage to get back up and running I highly recommend backing up your PC with either a snapshot tool (i.e. RollBack Rx) or a disk imager (i.e. Macrium Reflect)