As you know large laser printers draw huge power. I have no choice to put it on another electric branch. So when the printer runs the backlight on the keyboard flickers. The strange things is other USB items do not fail to operate. It does not matter if I plug the keyboard into the computer or even into a powered hub plugged into a battery backup. Since the backup with AVR is on the same branch. My question is if you guy's think this will shorten the life of the backlight? The printer is only used about an hour a month. If you think it will damage it, do you have a fix? Thank you