I currently have a MBP with the follow specs: OS 10.6.8 2.26 GHz Intel Core Duo 8G ram 500G SSD I've been having all sorts of problems with this machine. It will hard freeze anywhere from 1 to 30 times daily. After years of diagnosis I'm pretty sure a very swollen battery has put some micro-cracks on the motherboard. Here's a previous thread: http://forums.macrumors.com/threads/need-to-replace-logic-board-on-mbp.1988759/#post-23256873 It was suggested I try to get a replacement board through eBay. Instated I found the same machine on Craigslist for $150. The problem is that this machine freezes when watching videos. I met the owner for coffee. He couldn’t get it to freeze for me. When his freezes the screen goes dim and he gets the multi-lingual restart message. When mine freezes it just freezes. The mouse and keyboard are completely unresponsive. If a video is playing a rhythmic “bip bip bip bip bip” will cycle endlessly until I restart. He took it to a Mac Store and they told him that his battery and hard drive could be failing. What I don’t want to do is buy a machine with the exact same problem. What my plan is would be to buy his MBP and install my SSD and new battery in it and use it as my work station. Is there a way for me to diagnose what’s causing his machine to crash? Any help would be great.