A problem in regards to the battery is evident and it should be replaced. If replacing the battery does not solve this problem my suggestion would be to use a program similar to Window's Whocrashed (http://formac.informer.com/whocrashed). That application should allow you to find if the crashing is heat related, graphics related, or if there is another problem. I also suggest researching what the blue screen crash codes are as they can be very useful when diagnosing problems. If this all fails my suggestion is to find a new laptop you like. Your Mac Book Pro may have just reached the end of it'she life span.
I dont believe this has anything to do with the OS, System, or anything else, besides the hard drive. When I hear a clicking hard drive I see a ticking time bomb. I may be wrong but from what I have seen a clicking hard drive means it is malfunctioning and might soon fail.
This error typically occurs when there is a problem with the network board in the PS3. Which isn't good news :( Or you might be lucky, and find it is just the cable :) things to check: 1) try plugging the network cable into a different port on the router 2) check the corresponding LED for the new port - any activity? 3) unplug the cable, and try to connect wireless (as a test). If the PS3 can't see any wireless networks (assuming there are some to see), then it is the card Smiley Sad If it can see them, chances are it is the cable, or the router Smiley Happy Always worth unplugging and re-plugging the network cable at both ends, and / or trying a different cable
Look for any cable that appears to be connected to, or should be connected to, the display. To me and my limited experience it sounds like either your monitor's cable was severed or just pulled out a port. Open it up and look around for anything that doesn't look as it should; that's really the only valuable advice I can give you.