Hey, I have a Sony MZ-R910, and I'm suddenly getting a READ ERR message for all my discs, which are all Sony 74 minute, which came with the recorder when I bought it off ebay maybe 2 years ago. Old discs, brand new unused discs, it doesn't matter, they all don't work. Can anybody give me some insight on what to do about this? The manual just says to reinsert the disc, which I've tried to no avail. Wisdom anybody? Many thanks! Rufman