display lamp

Please can someone tell me that youre able to change the timer on the backlight for dp3600?! Mine literally goes dark after a second or 2. I cant believe that moto has put a radio out where you cant change the timer?!

One or 2 lamps behind the display burned out, and I wish to replace all 4 with LEDs. The Manuals do not give procedures for accessing the circuits behind the front panel. Does anyone have experience or can help with procedures to access the lamps on this great receiver?