Expensive day with the elst and MGM

First the steering servo stopped working. I replaced it and checked my bec voltage 5.4. So I went to run it again and in about 2 min the bec died. So I strapped on a receiver pack. Tried again, within a min no steering again. Another servo later and now I have no response from the esc. It lights up, the computer sees it thru the USB. It just acts like the radio is not hooked up. Steering is smooth and doesn't bind. Drive train is free. First servo was an airtronics 94358, second was an airtronics 94361, Bec was a Turnigy 5a, esc is a MGM 22418 running a outrunner in a Lst on 6s lipo