That's a good method, thanks for sharing. I replaced the negative cable with a brand new one a month about a month or so, and have not had any problems since. So I'm tentatively hoping/assuming that was the problem. I bought a new positive cable too; I'll install it when time permits or if the problem resumes. Or if a few more months go by without any issue maybe I'll send it back to FCP. Thanks to all for the troubleshooting suggestions!