Mike, I have experienced the same kind of problem. My QLG3 in my QMX+ had been working OK, but today only got a fix on one satellite, and then lost that as the day went on. I pulled the module out and checked all the connections to the board, then plugged it back in, but no change. It failed to receive any signals.. The QMX diagnostics shows the GPS viewer in red and the viewer shows no data being received. Did you ever try to get it going again?
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73, Dan - W2DLC
Daniel Conklin