Thanks for your reply. Alas, no fan and no beeps- just the 2 bars, so it's probably something else.
I've got a couple of quarter scale planes, with their higher wattage requirements batteries, nearing the point in building where you actually decide where these big packs go in the airframe and how readily they can be removed and charged in the field. Point is, I need to decide whether to get this "elderly" charger fixed or replace it with a newer, multi-port, integrated/"balance at the cycle's end" charger. Prices for a given capability are little-higher ($2-300) than when I bought the Xtrema (with its slightly unwieldy balancing) so, given that I think "balancing" in general over-rated and only do it occasionally, the repair cost will be the deciding factor. If there's anything I can do to help you guess what that cost might be, I'll try it before I decide to send it in or not.