Chas,
Thx for the reply! You’re right. Info is scarce. It doesn’t have a mute button or switch. Here are pics. I didn’t see anything resembling it in my Google image search. But who knows...
I bought it from shop goodwill.com. They are kindly considering refunding me my purchase amount, but since it’s going to a good cause, I'd like to fix it and then the cash can stay with them. Any help from anyone is greatly appreciated. Thx again Chas!
Pete