I saw a TX-7000 on the bay and decided to buy it. I've had (and some still have) a TX-2500, TX-4500, TX-5000, an A-10, A-7090, T-9, and the only one that I had checked out by a tech is the TX-4500. I was told by the tech that one IC was bad but didn't have a replacement (which one, I do not...