stan98103

I have a Sony MZ-G750 which I have used on numerous hikes/walks/jogs in the past two years with no problems. Recently it has started to skip badly with even the smallest movement when I'm playing a minidisc. The skipping doesn't occur when I'm play the radio. Does anyone have an idea what's going on or how I can fix it? Where should I take it for service in the Seattle, WA area? Thanks in advance. Stan