We have an old 2850 we are going to setup for a small client of ours, but this morning we noticed there is some kind of black goop on the motherboard (picture attached), its sticky and takes a good scrubbing to get it off your fingers.  I did some searching online and compared the area where the black substance is to pictures of 2850 motherboards online and I it looks like this little black pyramid/tower thing in front of the RAM slots turned to goop (I circled the black thing i'm talking about in the second picture attached).  Can anyone tell me what that thing is for, what its made out of, why it might turn to goop all of the sudden, and if it poses any threat to continued reliable operation of the server?  Thanks in advance for any help.