Bernie,
I've had similar problems with the Berhinger mixers. They can't be beat for the price, but their durability I question. If in 5 years this is the first problem you have had, then that is great. You have definitely gotten you money's worth out of that piece.
I would get a replacement board because you simply cannot afford to have equipment that can't be trusted.
If you don't mind replacing them a little more often, then Behringers seem to be one of the lowest priced boards for the features included. I don't think any of my Behringers lasted as long as yours have BTW and I had several. 1 year to 3 years was the life span I found.
Many people like the Mackie boards as a step up from Behringer, but I find them a little cold. I have heard that the preamps on their "onyx" series were quite good.
I use the Allen & Heath Mix Wizard 16:3, also comes in a 14:4 configuration. Great boards but a little pricey.
If money was no consideration I'd probably go with a "Midas", but I can't see spending quite that much more on one.
I think EV makes some good mid-range boards, and Soundcraft has a few in the lower ranges now. They would probably both be good choices
[This message has been edited by richard_shiflet (edited 01-29-2007).]