I have also discovered that my Epson scanner which was working before the new comp is missing a driver and there is not one available. So although it is sitting there with its little green light it cannot work!
The TV has improved with a jiggle of the Scart lead.
i have an epson rx640 all in one and also scanner would not work with windows 7 on my laptop ,
i have 2 other computers on the network that work ok, i use my scanner a LOT with the laptop,
so i bought a new epson sx415 just for the scanner and kept my rx640 on the other two computers,
the problem is epson scan, the old version won't work with windows 7, the one that comes with the new printer does,
sadly loading it did not enable the scanner on the rx640,
you will probably be able to use the scanner within windows but the options are very poor,
the version of epson scan that came with new printer is 3.70en, but although when i start it, it asks which of the two printers i want to use the old one still errors.