From what I gather the system powers on without grafix card installed.
If so , then you have the option to use the INTEGRATED GRAFIX in your CPU - ever since Core -i series Intel have integrated grafix inside their CPUs -that is why your motherboard has DVI & VGA outputs on the back .
You have 2 possible reasons here , and none of them are good news :
1. Dead PCI-e X16 slot - seeing you have a second PCI-e x16 slot - have you tried the RX 570 there ?
2. Half-Dead PSU
Chances are that either of these could have burned your new RX 570 as well .