I'm experiencing a problem with my C64R MK2 board, which is only a couple months old at this point. After the unit is powered on for an extended amount of time and allowed to get warm, the Sharp LCD TV I have attached to switches PAL mode, and the picture goes off center and mostly monochrome. I have a VIC-II 6567R9 installed. I have heat sinks from Ray Carlsen on the VIC-II (6567R9), SID (6582) and CPU (6510). I've tried another VIC-II (6567R8) that experiences the same thing, and I've got another version (8562) on the way from eBay, but I anticipate the same issue with it as well. If I turn off the unit and allow it to cool for only a short time, the picture returns to normal.
Everything is housed in a new C64C case that I received this week. It was happening in a bread bin case, and it's still happening in the C64C case.
Any assistance with this would be greatly appreciated! I'm very excited about owning this board since I only just recently purchased it. However, it is a bit disappointing to see the screen change into something that isn't right.