I just purchased a PowerBook Lombard 400MHz, and am unable to get it to run OS 10.2 reliably. It runs OS 9 like a champ, but I really need it to run OS X, preferably 10.3. When running 10.2 it would seem to run ok for 10-15 minutes or so, then it will lock up tight. Sometimes it will fade the display and show the power button graphic with the "You must restart..." thing, but usually it just freezes completely; no response to anything but the three-finger salute. So far I've gone through and re-seated the RAM, the processor card and the hard drive connector -- everything I could reach without tearing the case apart -- and got no joy.
The problem seems really similar to a problem I had with a 600MHz iMac some time ago where it would freeze after running for a short time. The problem there turned out to be the processor not making good contact with the heat sink. One thing I did notice is that there isn't any thermal grease between the heat sink and the white doodad under it. Anyone familiar with Lombards know how things should look under that heat sink? Should there be a bit of thermal grease there?
The guy I bought it from (through the LEM Swap List) says it ran 10.3 just fine before he wiped the drive and installed 10.2 on it (to match the disks he was shipping with it), and while I don't really have any reason to believe him, at this point I doubt he's trying to pull a fast one. He's responded to my emails asking about the issue, and while I'm hoping to be able to return it for a refund, there is the chance I'll be stuck with it. It's also in nice cosmetic condition, so if it's fixable -- and I think it is -- I'd really like to fix it.
Thanks for any advice or experiences you can share.