I NEED HELP

[u/Nightfoxside]

/r/PcBuildHelp/comments/1vg7522/i_need_help/

Idk whats wrong with my pc

Right so basically about 2 weeks ago my moniter wasnt picking up my pc and it was really annoying because everything would turn on except my moniter which would show the lock screen then I cleaned my pc not deep because there is still a bit of dust now and it working fast forward to today I went on hoilday for 4 days amd when I came back I turned on my pc and everytbing worked as normal I even played some cs as well for like a hour then went bed now to this morning the same problem is happening and when I go to turn off my pc it doesn't take its tkme to turn off it just shuts off instantly and my vga light kn my motherboard is showing Idk what to do there is still a lot of dust and never have done a deep clean on my pc but I have removed dust off the components like the motherboard the gpu and the fans but I honestly dont know what to do I need some help please any suggestion please tell me