Backglass Lighting
There are no bulbs behind the backglass. A florescent lamp illuminates the backglass. See image below.

Under the Playfield

Many of the bulbs are attached to the playfield with a rubber washer.

Some bulbs are mounted in these plastic holders. Notice the wires are not soldered.

Above shows the Vari-Target mechanism. It can register 5 discrete positions.
Instructions for adjusting the Vari-Target are on the Vari-Target side not visible above. They are shown below.


The image above shows the mechanism for the "Believe It or Not!" scoop.

Stern's main flipper mechanism. They work very well. I'm not sure why people complain about them.

This is the flipper mechanism for the upper right flipper. Notice it does not have an EOS switch!

The Stern ball trough. It uses gravity and optos and appears similar to the "new" Williams trough from 1993.

Here is the Shrunken Head magnet.

Above is an image of the Idol magnet.

It is hard to see, but the image above shows the Tic-Tac-Toe board. Look behind the mess of wires. I hope these bulbs do not burn out soon!

Here is a nice picture of the pop bumper and its mechanism
Lamps
Ripley's Believe It or Not has 79 lamps on the playfield! These are not general illumination, but rather can be independently controlled by the game.
Note that diagnostics also shows a "Tournament" light, which I did not see. Also, the Idol has a red light but this is generated by some other mechanism.
In addition to these lights, there are 9 flashers
Speech
Ripley Speech
Believe It or Not
Welcome back
It's time to visit North America
It's time to visit South America
It's time to visit Australia
It's time to visit Asia
It's time to visit Antarctica
It's time to visit Africa
It's time to visit Europe
Try a ramp shot
Collecting an idol would be good now
Another letter in my name. How nice.
Player 2
Player 3
Player 4
Player 1 is up
Player 2 is up
Player 3 is up
Player 4 is up
Shrunken heads! I love collecting these
A fast way to gather more jewels
Roller-skating penguins. How amazing!(Incomplete Listing)
Shrunken Head
Keep goin' man
Rock on hairy guy
We jammin' now(Incomplete Listing)