I bought a Powerbook off eBay saying it wouldn't boot up. Upon recieved it, it looks like someone has spilled Cola in it. I cleaned it up best I could and noticed burn marks on the DC In and a few marks on the Logic Board. I ordered a new DC In and installed it. When I turned it on I can see the screen flash ever so slightly (maybe sparks inside?) and something sounds like it's running (the fans most likely as there's no HD installed yet just RAM) Then the noise stops and the white sleep light comes on and makes a beep. Anything I can try before buying another logic board? Would a logic board fix the problem? Thanks in advance, this Mac has been stressing me out for days!