Yeah my DK JR has the slight jumping sound. It's mainly do to the old audio board in the monitor needing to be capped. It's not really a big deal, but I'm personally capping my audio board when I cap my monitor. In terms of your color problems, I would try adjusting the brightness and focus adjustments to try to brighten up your colors a bit. These adjustments are located on the flyback which is under the flyback cage. When removing the flyback cage, be sure the power is turned off. You can make adjustments to it while the monitor is turned on with a long flat head screwdriver. If the adjustments still aren't good, it's just old caps, and they need replacing.
