As Mark was getting at in another thread -

1) Find room lit so that the button lighting is visible along with the fascia.

2) Mount camera on tripod, turn on self timer, turn off flash.

3) Set custom white balance while filling frame with white sheet of paper.

4) Aim at empeg, press shutter.

If your camera doesn't have some of these functions, let us know what you've got to work with.

Matthew