First time here: I have a Graphtec FC3100-60 plotter, that has been a work horse for years, but I turned it on Friday & it started making a squealing noise. I called Graphtec Technical support & let him hear the noise. He suggested it is a bad board & they don't have any in stock. Anyone else have this problem? I don't want to spend hundreds on a new board when I can buy a cheap or used plotter, but if someone was parting one out...