Have you tried opening that one and repairing it? It's usually stuck contacts. GENTLY pry it open and have a look. A little sand paper or even your wife's nail file to clean the contacts will do the trick. If you don't want to try that, send it to me and I'll do it for you. You can PM me for my address. I'll look at it and if it's fixable, I'll do it and send it back to you just for the cost of shipping.