Update:

I took off the front plate.
There appears to be white plungers and black plungers inside the
camera.

There is a black plunger inside the battery case cover that activates/
deactivates when the battery cover opens. This plunger tells the
camera not to power on if the battery cover is open.

There is a black-colored plunger and white plunger tied to the lens
cap slider. I assume "black" means camera should turn off and "white"
means turn on.

I removed the front plate and put it back on several times but still
no response when the lens cap is slid over to power on.

Camera function still not working. Everything else still working.

-John