I purchased a used Casio LK-280. It looks like it is in great shape. No signs of physical damage of any kind. All other features seem to be working great, except for the keyboard keys not lighting up. I've gone through the manual, page by page, to no avail. Reset it according to factory default settings (pg 8), nothing happened. Held down the function key for several seconds, able to see the feature on the LCD screen that indicates keyboard light is on or off. I tried both on and off, and nothing changed. Does anyone have any suggestions for me to try? I'd really, really love to get this working! Thank you for any ideas you can offer! Richie Rich
