Digital piano power supply help

[notallbad]

Would appreciate some guidance to run through a few basic tests to see if all is well in the power supply circuitry.

I have been trying to eliminate some noise on the speakers and think perhaps checking the power supply may be a worth while exercise.
Other thread with photos and SM rather than post again.
https://www.badcaps.net/forum/showthread.php?t=32049

[Agent24]

Re: Digital piano power supply help

http://www.youtube.com/watch?v=xaELqAo4kkQ

http://www.imcpower.com/prodigit/an_403.htm

Might help?