Re: battery drain
I agree wholeheartedly with proper troubleshooting procedures and instruments (a nice little DVM is often a freebie at HF) with the caveat that once you determine there is an excessive drain (200 ma will drain in a couple of days, 50 ma is spec after connected for a few minutes, >20ma is what I usually see in a quiescent state. ), then pulling fuses until it goes away is often the fastest way to find the causing circuit/component.