I had a problem with my motherboard and had to take it out to RMA it. while cleaning off the thermal paste on the top of the CPU I managed to stupidly get some on the underside of the chip (I was holding it in my hand at the time). It was only a small amount. It got onto the area of little metal circles that surround the centre but not into the very centre area of the chip. I cleaned it off as best as I could but you can still see where it landed as one of the metal circles is now slightly discoloured. The thermal paste is MX-2.
Have I destroyed the chip? Am I likely to fry the chip and the motherboard when I put it back together? Is it worth taking the risk or is it better to write it off?
All help appreciated.