My Dell broke recently when the mobo fried, so I bought a new case, PSU, mobo, cooler, and RAM in order to salvage the remaining parts that worked just fine. Being the first PC I've ever built, I took out the CPU from the old PC, and placed it in the new one, but didn't apply thermal compound because I thought it already had some on. I placed on the cooler, installed and hooked up everything, and tried to turn it on. However, the LED lights in the front would only turn on for about half a second, and the case fan would start for a couple seconds before the computer stopped. I tried numerous things, from testing each stick of RAM to disconnecting and reconnecting all the wires. I took off the cooler finally, and saw that the bottom (not metal, but some weird gray looking mesh) had melted onto the CPU's heatsink. No damage seems to have been done to either part; only a melted compound. If I get some thermal paste, should the PC start properly?