Haven't seen a post about this exact problem so I figured I'd give this a try. A few days ago, I was having trouble with my macbook (2nd gen I think). It was constantly needing to be restarted before it gave up entirely and wouldn't start up at all. I tried troubleshooting and found that it worked fine after removing one of the ram sticks. So I bought new ram hoping it was really this simple. After installing both sticks, the computer started fine and ran without any problems. However, as soon as I replaced the battery, the computer would no longer start up. Removed the battery and it was fine. So I removed the new ram from the slot that was originally giving me problems and suddenly the computer runs fine with or without the battery. Any suggestions?