Yamaha CVP 307 Main Display screen .....not working!

by Annie Cooper Johnson
(Gainesville, Florida)

My concern is for my CVP-307's main display screen that shows no display. The LCD button on the upper left hand side no longer determines the brightness/darkness of the display now. The result is no picture on the screen at all! It is blank after it is turned on.

I am a devout Yamaha piano and keyboard user, from my place of employment, church and, it is my personal instrument choice of all instruments for decades.
I have never had problems with this instrument before. It is 10 years old.
The closest service tech that I can get is about 45 miles from home.
Thank you for your helpful solution(s).