I have a hantarex 9110 and it will not stop rolling. I use a scan converter, which works great on my friends WG7400, even in 640x480. I set the vhold perfectly, and someting as subtle as the wind blowing ( its outside for now) sets off the v hold. My buddys robotron and SFII have at least a 16th of play in the vhold that sets its sweet spot. Mine is about 1/100th of an inch. Any suggestions. I replaced the POT and it still did not solve it. I do believe the chassis might be bad, or part of the control board with the vhold trim. Thanks