This could be one of those really stupid questions, but my new Sony xdr ds12ip alarm clock seems to come on without sound every now and again. I can't work out what changes between when it works and when it doesn't. Sometimes all works perfectly and then sometimes I simply press "DAB" to switch it on, the display shows "preset 1" along without the station that it should be on, but it doesn't seem to tune in and there is no sound. The only fix seems to be to turn it off for a few seconds and then when turned back on it all works! Any help greatly appreciated.
