Computer doesn't start up

Mar 10, 2018
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Hi, so i have this computer for more than a year now and the drive D always gets full on space but dont have anything on it. And now after sometime i open up the conputer and it doesnt start anything, it just lit the led for a few seconds then doest load anything just black screen then off and power button just blinking. Cant shotdown it normally even if i hold the power button. Need help asap, dont know what to do.