OK, well I am going to assume that you meant to ask if the backlight can be turned off while the 3200 is in use...in which case the answer would be 'No, not without using a hammer." If your 3200 has its backlight on while it is in standby then you do, indeed have a service issue...or a very rare 'land of the midnight sun' edition.
Russ
We kid because we love.
Bang & Olufsen Tysons Galleria
McLean, VA USA