This looks like an old PC and odd combination of the 1070 and 4GB RAM. There may be more story here about the GPU upgrade or more?
Try it with the old GPU and with as few parts as possible but some of the parts are 7 years old so you have to work this as if it's just old parts that are dead. It does not tell you what has failed but you can try your display on another PC, another display on this PC to see if it's display or the PC.
Then reduce what is in this PC and swap back to the GPU that worked before.
The age is also old enough to need a CMOS battery. Always swap those out on old PCs.
Hi, I have an fx 8350, Asus m5a99fx pro r2.0 mobo, 4gb ddr3 1333 ram, and a gtx 1070.
The pc turns on and runs, but no matter what I cannot get a display signal. Any help would be greatly appreciated