I've got kind of a strange problem. My pc will boot, I can hear all the fans and whatnot turning on, the lights on my motherboard and gpu turn on, but the monitor doesn't turn on (and when turned on doesn't receive a signal) and the case lights, on button and hard drive activity light don't turn on. Seem completely unrelated to me. My computer crashed a few times before this all happened. Funny enough, I had been playing a very gpu intensive game for a few hours, then I stopped to play a much less intensive one (spore to be exact) and a few minutes in my computer crashed. Turned it back on, launched spore again, and then it crashed again. Then things get weird. I turned it on, then it turned itself on, then off, then on again, over and over. Eventually I had to unplug it. After letting it sit for a while and turning it back on, it seemed to boot fine, but the monitor didn't turn on nor did the lights. For a bit more info, it was the first time I launched spore, and I have a pretty decent pc - 8gb GTX 1070, 16GB RAM, i5 7600. I could provide more specs but I'm not sure how they're relevant. One more thing - someone who helped my build the computer said the protective coating on the mobo was damaged, so something bad might happen at any moment. My pc was running flawlessly until this all happened, btw. Could this be a motherboard issue? Sorry for the information overload, I just don't know what is relevant to the problem. Thanks in advance.