be bad caps, or a weak power supply.

Check the caps, they must be flat from above.
See image for example..


Try another 12vdc 2 amp power supply or higher amps.
But beware the polarization, the center hole is +, the outer ring is -.

(Thank you to Johnny_B for publishing it)

All the best about hardware/support from Johnny_B, link :
http://jb8a8f8.com
http://jb8a8f8.nl


Attachments
Top-view-of-a-row-of-failed-capacitors.jpg


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