My powerbook is 4 years old with panther installed. I dropped it a couple years ago and dented the case which voided the warranty. I sent it to apple and they told me I had killed the hard drive and they wanted $950 to fix it. I said no thanks and got a 80g drive off ebay and put it in myself. It was working but having a battery charge problem that I lived with. Here is the main problem. If I pick the computer up by where the hard drive is, front left the screen would go blank and an error message telling em I have to restart the computer now message comes up. I would restart it and as long as I did not pick it up wrong it would be fine. To be totally honest when i put the new drive in i forgot to put the two plastic bumpers on the drive so it would rattle around a little bit. I figured this is why it would make me restart it. Today I took the drive out and put the bumpers on it. I also erased everything on the computer and reinstalled osx. The computer will not get to the login part without giving me the restart message. I get the chime, the apple logo, the gears and then thats it. restart message. The computer is worse now then it was before. I am wondering if something else is damaged inside that i can replace to make this work or what the deal is. anyone else have this problem?