I have a DMREX77 that worked fine for a couple of years but then developed a weird fault which is a little difficult to describe: When viewing from any AV source, ie. recording from a scart input, the picture is fine, but the audio has the terrestrial input (RF) bleeding over it. I live in Spain, took it to a local Panasonic authorised dealer who had it for a couple of weeks and then said one of the main boards has blown and replacements are no longer available. I've now donated it to my Dad who has already replaced capacitors on another faulty Panasonic machine and fancies having a go at repairing this one. Any pointers or ideas where to start greatly appreciated.