Picture keeps rolling

thanks for all the help I called Sony e-support and they told me the nearest authorized repair personell in my area for repairs I was curious so It worked fine before we moved it to the living room it was made in 1995 so over the years it built up some dust inside so I took the back cover off and used a hair dryer to blow some dust off then used a small fox tail brush and then I took the shop vac and put the hose on the blower end and after blowing it all out dirt from everywhere I plugged it in and it was PERFECT it stopped ROLLING and I saved a trip too the repair man so sometimes just a good cleaning will do the trick a lot of dust was blown out and it works as good as NEW Me and MOM are very happy Thanks everyone Chris thanks for all the help I called Sony e-support and they told me the nearest authorized repair personell in my area for repairs I was curious so It worked fine before we moved it to the living room it was made in 1995 so over the years it built up some dust inside so I took the back cover off and used a hair dryer to blow some dust off then used a small fox tail brush and then I took the shop vac and put the hose on the blower end and after blowing it all out dirt from everywhere I plugged it in and it was PERFECT it stopped ROLLING and I saved a trip too the repair man so sometimes just a good cleaning will do the trick a lot of dust was blown out and it works as good as NEW Me and MOM are very happy Thanks everyone Chris