DISPLAY UNIT PROBLEMS
If you believe that you have a Display Unit problem, here are a
few things you might check:
1. Hit clear key; can you enter data and do functions on the
display, and does it stay there?
YES. Good, that's what you want.
NO. Do you have a marker line on thJiiL Display after hitting
the cl ear key? .
YES. Skip to 5.
NO. Do you have anything on the CRT?