Hi, I bought a CPU last week and before we buy, ofcourse we tried and it worked fine. when I attached it to my monitor, it says "no video input". after removing and attaching again the VGA cable, it worked, but after few minutes of using, it returned to "no video input" again.. I tried to remove wires and connect to the outlet (since I used AVR) it worked again. So I thought it was my AVR was damaged. But after buying another AVR, it returned to "no video input" again, I tried to use my old AVR but nothing happened.. I tried to buy another VGA cable but nothing happened.. I tried to use my old CPU but again, nothing happened.. I dont know if its because of my monitor because we haven't use it for almost 5 mos. and it worked properly before and why is it, it worked fine for 15 mins. (after using with my new CPU) and then .. after few mins. again.. it says "no video input" Pleasse help me.. thanks and God bless!