Author: Ken Shaw ★2017
Date: 2015-03-04 18:44
It's 99-44/100% sure to be a hardware problem. For the clarion B4 , try pressing on the F/C key as well as the E/B key. If the problem clears up, a simple adjustment of the crow's-foot is all that's needed.
However, since the C#5 is also bad, I suspect that the low F pad is not seated correctly. Have your repair tech check the seating carefully. The rim for that hole may be nicked or uneven.
Also check out the seating of the other three large pads.
Once you get that fixed, B4 and C#5 should come out easily.
Ken Shaw
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