I was recently cleaning my pc because i noticed there was a lot of dust inside it and I had to remove the graphics card. While i was cleaning it must have knocked some of the wires or something because now that I have re-connected the graphics card all there is no picture appearing on the monitor, it is however coming out of "Power Saving Mode" so some signal must be going through. IT just remains black. I've Tried reconnecting it numerous times but the only successful attempt made the colours all wrong, everything had a deep blue tint. Also i've noticed some red lights are on the motherboard, not sure if it was like that before but thought it might be useful.