I have just purchased an Iscan pro from another forum and been pleased with it over the past few weeks, however I am getting 'dropped' frames, about 2 per film. Is this 'normal'. the dropped frames last for about 1 second when the display goes dark grey. Is there anything I can do about this? I read from past posts that museumsteve had the same problem, but that was caused by his amp switching, although I was using a switch box this is still happening without it. Thanx in advance Azzo.