I bought an EVGA RTX 2070 XC Black recently for a friend's build and I tested the card at home in my system to make sure it worked (and to steal the game code for Modern Warfare). It worked in my system, we got the rest of the parts, built the computer, and it worked in his system as well, but only for a day. The day after we built it, he was telling me that it was not outputting to the monitor. I checked it out, and it certainly was not working.
The blue that usually lit up the text on the side of the card was not lit, the fans were spinning at full blast, and we were getting no output from the card. I took it home and tried on my system and the same symptoms were seen. I've tried several things, obviously reseating didn't work, we tried on two systems with two different motherboards, PSUs, and everything really. The only thing that I can think of at this point is trying other PSU cables, but I do not have any on hand, and don't want to buy any unless I have to.
The reason why I think it's not drawing power from the power supply is because I plugged the card in, and tried turning my system on without the PSU cables plugged into the card, and it did the same thing as mentioned before: no lights, fans full blast, no output.
The card is no longer available for return, so, I was curious if anyone had any ideas as to what the problem is, and/or how to fix it, or if, God forbid, we just wasted $600.
I've included some images that show what I am talking about, though, I'm not sure how helpful they are in this situation.