I have 2 PCs connected via an automatic switch box, using fully wired male/male plugs, to a Samsung laser printer. When either PC is powered up or powered down, the printer spews out unstoppable reams of blank pages and garbled pages. This does not happen if I connect simply PC to printer. I've tried reinstalling the drivers, and swapping over the leads but no good. Is it something to do with the printer settings eg network printer/ordinary printer, or the spooler settings, or does anyone have any ideas please?