Terry.... (here is my first attempt to helping someone) all I can share is what I learned.
To get to the screen lights, go to the back of the machine. Push in the solenoid that works the magic screen. Locate the gearbox that turns the magic screen and manually spin the fan with you fingers. The magic screen should begin to move. Once the latch clears the notch, you can stop pushing the solenoid until the next notch comes around. I found four notches. The idea is to get the space in the screen panels to appear on the left side (from the front of the machine) of the bingo card. Once the space in the magic screen panels is on the left side of the bingo card you will see a black clamp held by two screws. Loosen the screws a little and the clamp will slide off. Grab the plastic (mine was) or glass bingo card and get it started coming out the space in the magic screen panels. Just get it started. Careful not to scratch the bingo card. Go to the back of the machine and continue to move the space in the magic screen panels to the right. Go back to the front of the machine and work the bingo card ut a little further. I had to repeat this several times. Eventually the bingo card comes out and the bulbs are accessible.
Sorry I didn't know the real name of all the parts involved in this process. I learned this when I was thinking of replacing all the bulbs at the beginning of my project. Remember I am new to all this ... but I still willing to help.