The problem with the DGT Centaur chess computer is that the illuminating LED circles that indicate the computers moved are also visible when not in use and spoil the whole appearance of the board. To eliminate this, just print a new overlay board from standard printing paper then cover with transparent self adhesive book cover film and the circles will disappears when unlit.
As I don't haven't a A2 printer, I have had to print four A4 sections of the board.
Stick them all together with transparent adhesive film on both sides.
You can now compare the new top board sitting on top of the original board.
Stick the new top board onto the original board using tiny pieces of double sided tape in each corner (smaller the better so as not to damage the original playing surface. Now you can see that the annoying unlit circles have disappeared.
Now check that that the LED circles are visible when you make a move which they are.
If I can make the unlit circles invisible then why didn't DGT??