Sometimes when i turn on my PC the fans start to roar and the displays just stay black, I've been looking for an answer to this but I can't seem to find one, this is confusing as only sometimes it happens, plus i turn off my computer as normal everyday. The only way to fix this black screen problem is to turn off the computer manually, and then it starts up normally most times. I just wanted to know how to fix this, even though it doesn't happen all the time, it'd be nice to know if theres anything wrong with my PC, thanks