10-06-2009, 04:34 PM
I have had PB's of the aluminum type up to 1.42GHz they would get very warm on the underside not as hot at my MBP but still hot..
The last one I had i think it was having a similar issue as you may be seeing
with out knowing for sure but the video chips if they over heat have a
tendency to separate from the logicboard. causing lines across the screen
or just instant freeze ups..
try the normal stuff .. boot up holding the command (apple) and the s key
disk check fsck -fy
re-setting via openfirmware holding the o, f, opt and command
hold down the alt shift and option key (when off) and press the pwr button
check the memory .. just normal items .. if all else fails try a chill mat and
see if you can reduce the temp and if that makes it stable .. you may be
looking at a logic board or something else that only a mac shop can help