Go back to the beginning and don't assume it is some thermal paste (although this could cause a short).
When you turn the power on to the motherboard, what happens?
If nothing happens, disconnect everything (RAM, drives, video card, cpu heat sink, etc), everything except the cpu. Leave the power to the mobo and the cpu hooked up. Turn on! You should hear 3 beeps which means the mobo is working and doesn't recognize any RAM. If you don't hear 3 beeps, your mobo or cpu is junk.
theres already a big piece of burnt material on my mobo so I KNOW its dead just dontknow about the CPU
the people there said since the ram didnt die the CPU is OK cause the short will pass the ram first before the CPU