Several years ago I installed a stand-alone AFS AOA PRO in my 9A panel. It has worked flawlessly-until recently. Now, the digital display stopped working. The center donut does not change from black to green when operating the flaps. I still get a “FLAPS” oral message when lowering the flaps, but no changes in color or digital read-out when ascending or descending. I’ve checked the plumbing and cannot find any loose tubing. Any ideas as to the cause or the solution?
