I'd been hashing away happily, mining Eth, with my 4x RX 580 rig. It shut off for some reason and now when I start it up it shows the Asus screens, but then Windows won't open, it just shows a black screen. Is there anything I can do in the UEFI or anything, instead of just trying to reinstall Windows from a usb stick?
Please state your complete setup
how to ask help for troubled GPU -> https://bitcointalksearch.org/topic/how-to-ask-for-help-with-troubled-gpus-rig-guide-3191707
a lot of probable reasons
might be a riser on the GPU connected to your monitor etc.