Dear community. Few weeks ago while typing I heard like a crack inside. Ever since my Powerbook makes a funny noise, got extremely slow (I cant watch videos properly anymore), but the worse is that after 20 min it overheats so badly (mainly in the left side, right side is colder) that my fingertips burn when typing or using the track pad. My palms are red by now. This wasn't happening before, so could it be serious? I put it to sleep every now and then to cools off, but the burning and poor performance is getting unbearable and I need it badly for my thesis writing. Less than a year ago while on minor repair of the adapter port, the staff made a mistake and had to replace my keyboard, case and main logic circuit for free. So I dont trust those Regent St. guys anymore. Please help!!