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The AoA display getting dim sounds like a separate problem, but the E11 and E33 may have been due to water in the sense lines, or perhaps a loose ground wire at the red and black pushbuttons. The E33 just means that some other error was reported and, (from the manual) the E11 means:
Reasonableness ramp check of the wing
differential pressure transducer is not within
acceptable limits. This may be due to wind or
might be due to damage of the differential
pressure transducer. If the system re-tests OK in
a hangar, assume the problem was due to wind.
If the error persists, a re-calibration of the AOA
may fix the problem. If the test function was
activated during flight, this error message is
expected and normal.
I'd remove the sense lines at the CPU and *gently* blow them out just to be sure, but is it possible that you may have inadvertently touched the black and red push buttons? As you know, the black is the dimmer button and the red is the test button which would account for both your problems. Is it possible that ground wire to those two buttons is loose? I'd closely inspect the wiring to those two push buttons.
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