Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5) Hi, My black MacBook has been acting up lately. It's been running really hot, and whenever I would pick it up and move it I would get a kernel panic or it would just freeze. I decided to open it up and clean it and see if anything was broken. I opened her up and found a lot of dirt and stuff, so I cleaned it up and reapplied new arctic 5 thermal compound. I was vey careful not to break anything or lose anything. After I did all that I reattached the keyboard real quick to see if it worked, and it did. I put it all back together and turned it on. Now the screen flickers for a second but won't turn on. The computer runs, I can hear the hard drive and everything. So what could I have messed up?