Unplug everything, hold power button for 10 sec. Then you're going to have to open it if you're comfortable in a computer. Couple things I know are swap RAM around, may try temporarily unplugging the cables that go to the mother board too. I've had to do random things sometimes to bring mine back.
They figure it's either the power supply or the RAM failing. We'll see... Either way, I'm probably gonna be out some money here in the next 2 to 5 business days...
Apenas os Tesla e as RAM falariam isso, qualquer carro de bem odeia o elon