There is in fact a history of capacitor failures on these mounts; luckily it is
usually the same ones. If you remove the front cover of the mount the
board is seen mounted vertically, and the two large capacitors visible at
the bottom front of the board are the ones. If faulty they will be visibly
swollen [or blown]. If they are blown you can get replacements from Jaycar
for about a dollar each. If you end up doing the job yourself you will need a high temperature soldering iron. Its worth a look for the minute or so that it takes to remove the front cover.
raymo
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