I've had no IR issues (the first few minutes when it's cold is the only time really), and no buzzing. I think it may be a PSU issue, my parents have an old Pioneer that is mostly totally fine except for audible buzzing.Haven't checked mine. I've just bought a B8 Oled to try out. I'd keep the ZT forever but the IR is getting worse now so I have to be careful about how i watch the TV. Plus the buzzing can be irritating. Watching something like Fortitude on Sky Atlantic was hard work. Anyone else have these problems?