I recently purchased a pre-owned Roland SPD-S. I have just now put it into use for a project I'm working on. Unfortunately, along with the sounds, I am hearing mechanical white noise the entire time it is on. It sounds like a high pitch hum, or like a "whirring" sound and it's constant. Also, I hear different mechanical noises at different pitches as I press various buttons and select different functions. The sound is audible when both the headphones are directly in, and when the output R & L channels are being used. All the functions and triggering are in perfect order, but this sound won't go away.
Has anyone heard of this? Is there a solution? Or was I sold an instrument with a foot in the grave?
Thanks in advance for any info you might have.