That's absolutely the worst. "I'm not sure what's wrong Mr. Customer...why it won't do this or that. I'll have to get the Big Guns for this one" or some such dance, only to discover (credit to Mr. B. Gun) two 12 volt batteries behind some secondary panel, buried beneath the EQ box in the controller, are below the operational threshold, and THAT'S why it wouldn't run. DAYUM! We have a number of these type units and we're all challenged (well...except the "Guns") when we have to take calls on these types of equipment...even our own "new" stuff can hammer us. Personally, the MRL is not one of my fave's. Old school here. Oh yeah...I almost forgot, Viva Internacional de Elevadores S.A. de C.V.! Ha!