My friend has a Kn6500, the LCD screen is going. It is getting dimmer with a mark in the center of the screen.

My questions:
1-I do not see a video output on the Kn6500, is there possible to add one.
2-What is the cost of adding a LCD screen if available
3-Are there any options.
I know this is a topic that has been gone over many times, but I am trying to help a 83 year old keep his music going. He loves to create technics midis.

Help much appreciated, John C.