answer:I’m a little confused about what works with what, so tell me if I’m wrong: (1) The display on the normal television works fine when using the VGA port (with a single cable connecting the PC to the television and no intermediate converter). (2) The DVI output is hooked into a YPvPr converter, which when hooked into the television causes the issue. I’m unclear on whether when you say it’s extending the desktop to a second screen that it means there are multiple screens plugged in or that it is simply reading multiples. It might also help if we knew the model television, year, and available inputs for it.