Do I have raster centering magnets? I have replaced my old burnt green tube with a new. The green picture is much lower than red and blue. I can not get there by adjusting the pots on the vertical def. board or using anything in the menus. I have done astig this evening. The blobs are all round and nice. So my next thoughts goes to the raster centering magnet, if I have any. Could anyone give me a complete checklist?