Hi there! If you were able to fix the problem, please let me know what you did. I have a similar problem, only my screen is black, with colorful vertical lines. So, it doesn't seem the LCD isn't working, it would seem maybe the ribbon to the screen is detached etc.
I just bought one at a garage sale. Everything works fine, but the screen does not display properly. when you turn the unit on, all you get is vertical lines on the screen. They are random each time you turn it on. Is the ribbon ripped? If so, can you get a new one??? If so - where?