Marty, that's too bad. Are you charged for a diagnosis? Whenever I've had problems with a sewing machine (or really anything honestly), if I bring it in they'll usually look it over and tell me how much it will cost to repair it, before I pay anything. Sometimes, a place will charge some small amount for a diagnosis--for their time--but it is always refundable if I have the work done there, and free if it turns out to be a warranty issue (assuming the warranty includes labor). Sometimes I'll sign a paper authorizing repairs up to (for example) $75 and if it is any more, call me first. I'd think you should be able to find out if it is a warranty issue or not without being obligated to pay anything more than perhaps a refundable $25 diagnostic fee.
As far as your problem, is your screen white or is it normal? If it has turned white the machine may somehow be stuck in the middle of thinking you are changing the needle or presser foot, thus locking all of the buttons. There is also, of course, the lock key, which I am assuming you didn't press. Have you tried removing all of the thread and rethreading the machine? If the thread somehow got in the wrong place, the thread detection system could be locking the machine also. Does the display show any error messages?
~ Miss Fleecy
