I have a Williams Cyclone pinball machine that I've been restoring. So far I've: stripped the playfield of mylar, cleaned and polished everything, rebuilt the flippers and pop bumpers, replaced a burnt up relay board, installed a CoinTaker Premium Non-Ghosting LED Kit, relocated the batteries, replaced the rubber components, and many other miscellaneous things.

After all of this work was done, the machine worked pretty close to perfect as you can see in this video:
https://drive.google.com/file/d/0BzHU_eZaaUetMktSak9GOTZkODg/view?usp=sharing

But it had an issue where after turning it off then on again, the machine seemed as if it wasn't getting steady power. The flippers, slingshots, and pop bumpers would not hit as hard, the coils wouldn't snap as hard, and the alpha-numeric display would not illuminate fully (segments were not lighting up). This problem persisted for weeks and would come back seemingly randomly.

Now, a couple months later: many of the LEDs won't light up, the ferris wheel doesn't spin, and the flippers, slingshots, and pop bumpers don't work; as you can see in this video:

https://drive.google.com/file/d/0BzHU_eZaaUetbkNmc0NrUnUzYWc/view?usp=sharing

Any ideas on what could be causing this? It seemed as if the machine wasn't giving steady power to all of the components and now it's barely giving any. Would replacing the power supply: http://www.marcospecialties.com/pinball-parts/D-8345
be the fix? Or could it be the wiring underneath the playfield is bad? Any other ideas? Thanks!