If you look up at the top of the instrument panel trim there should be 2 screws. These allow you to remove the plastic surround then you can see 4 screws that hold the instrument binnacle assembly in place. Don't drop them as you remove them!
You should be able to pull the instruments out and unplug it then take a look at the back of the panel. It sounds like the back light bulb for the LCD display has given up.
Craig.