So I had a pretty bad looking beat up old case that was embarresing to look at so I upgraded to the nzxt n450. Once I took everything out of my old case and put it into my new one and plugged it into my ASUS VE248H 24" monitor it said no signal. I have no idea how this happened because I took very good care in transporting my sapphire radeon r9 270x into my new case. please help. I have tried moving my card to a new pcie slot bu that doesn't work either. The fans still spin and everything on it however it still gives no signal. I took it out and tried my old video card and it worked so I don't think it is the motherboard. Is there any way that dust or something got on it and I can clean it?