3 or 4 days ago i sat down to use my pc as normal but when i nudged my mouse the monitor didn't wake up. I tried my keyboard and still nothing i turned on and off my monitor and it said no signal eventually had to turn on and off my power strip and when it booted back up everything was fine. this has happened about once every day since the first time it occurred i've had my pc for about 5 years now and haven't had any problems like this. the pc is an alienware X51 R3 running windows 10 that has mostly all of the parts it came with besides 16 gb ddr4 ram and a 1660 ti inside of an alienware graphics amplifier that i got at the beginning of the year. any help would be appreciated.