The fan of my computer stopped working,so I replaced the fan with a new one and installed it myself.The new fan is working but the problem is I dont know if I installed the fan backwards or frontwards.Is the air current for the fan supposed to blow air out of the computer or suck air into the computer? The way I installed the fan is resulting in the air current being sucked into the computer.(if I were to place a piece of paper in front of the vent of the fan from the outside of my computer,the air current trys to suck in the paper and causes the paper to stick to the vent). So my question is,did I install the new fan backwards and is the air supposed to blow out of computer or suck in???