I have recently acquired an 867MHz Titanium Powerbook G4. Since having it the past few days, I've learned this thing has got a huge set if problems. Most of these I think can be attributed to small bits of corrosion on the logic board which I've discovered. The first issue I encountered was the computer always booting up into "Startup Manager" to select a boot drive. Even without holding down the Option key this happens EVERY time I power on or restart. I also discovered that holding down "T" would not get it to boot into target disk mode, Instead, "Command" would boot into TDM.... weird. I also noticed the problems while trying to do a fresh install of OS X. During installs of both Leopard and Tiger, the installation would fail at different times. This lead me to think there could be a memory problem. I removed the RAM and tested it in an iBook and both sticks worked great and had no visible problems. Upon further inspection, I noticed some corrosion around where the RAM sockets meet the logic board and near where the keyboard connects. Its also worth mentioning that once I did get an OS installed, I frequently get application crashes and kernel panics. Unless I'm missing something else, I think this can be all attributed to the corrosion on the board. Does anyone have any suggestions on the best way to clean it off without damaging circuits? Fortunately, the underside of the board looks good, its all on the top (which is also the hardest part to access). Any ideas on how to get this thing running properly without buying a new board?