Question Monitor goes black, fans very loud

[jdermotflanagan1970]

For some reason, quite frequently my monitor has been going black and saying "no signal" while the fans go crazy. I've tried reinserting the hdmi on both PC and monitor but no change. The computer will not even shut down if I press the power button. I still hear all audio but cannot use my keyboard.

 

[rgd1101]

full system spec? include make and model of the psu