My SA Series 2 (240-xxx) has been acting oddly for the past few days. Its our #2 Tivo so its not in constant use. Occasionally the picture will lose color - that is ALL screens - even Tivo screens. I've read about S-video and the black&white problems but I use coax. And this doesn't seem black&white so much as it seems like the colors are maybe extremely over-saturated or over-bright. What really odd is that if I re-start the Tivo the problem disappears.... and then comes back several hours later. I have double-checked all connections. Any ideas ?