I have a 2007 MacBook that functioned perfectly, and then started having trackpad issues seemingly out of the blue. I took it to my local guy (not Apple, but I've dealt with them extensively in the past and been very happy with them). They're saying that the logic board needs to be replaced. I guess what I'm looking for is a gut check - i.e., is a failing trackpad a symptom of a faulty logic board? I've done the Googling and it seems there is some evidence for yes, but I'm posting here in search of more opinions. There was one additional issue, which was that the machine failed to sleep. I should also add that I tried all the quick and dirty Internet-recommended trackpad fixes and workarounds. Also, I'm sorry I don't have more specs about the specific machine, but this is really a general question: are trackpad/sleep issues a good indicator of logic board failure?