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Help: Noisy Rowland 10 power supply

I did not use my Rowland 10 for several weeks; I left it plugged into the AC outlet, but not on.
When I turned it on today, there was a continuous loud buzzing sound from the power supply that didn't go away. Surprisingly, it could still produce music through my speakers. Any idea what's going on?

I've decided not to use it for now because I'm afraid I may damage it even more, and worse, I may also damage my speakers.

I will call Rowland on Monday ... but I just wanted some feedback this weekend, to release some tensions :(

Thanks.
jacpiii

Showing 1 response by jwaugh

jwaugh
103 posts
 
You may just have a problem with a ground loop. You can search prior threads for solutions and discussion. Try a 2 to 3 prong adapt (from any hardware store) to defeat the ground on the Rowland and see if the hum goes away. If so, then you do have a ground loop and should follow the trouble-shooting steps discussed in prior threads to optimize how you get rid of it (i.e. not leave your amp's ground bypassed).

Best of luck,
Jacob
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