This is my first foray here asking for advice. if I am posting to the wrong place please redirect me. I bought a partially shopped Xenon pin a couple weeks ago and really want to bring it to great working condition.
It is in pretty good shape cosmetically, but the flippers need rebuild and there are some lights that stay on and some that won’t come on.
Today I adjusted the flippers to keep them spfrom sagging ...the right was weak and neither could catch very well due to bad alighpnment. Well, I thought I was done, Fixed a bumper light that was not soldered well....and closed her up expecting to play a game.

After powering up the game, The initial lights game on ....back glass and the ‘always ons’.....and then a few seconds later a quick ‘flash’ of all the lights....a sub second flash....and then nothing. A few lights on the play field (the two blue Ns and a couple others) stayed on, backglass scoreing lights seemed ok, but the machine won’t initialize.

The machine is in that state now and I have no idea what to check.

This happened a few times last week, and I thought I had not attached the backglass connectors correctly so I undid them all and re connected them and all worked fine. This time, no go.

Other issues (when I do get the power up fixed...), The #2 rollover button up top does not drop the #2 target....all the others work fine.
The exit chamber sometimes does not ‘catch’ the ball.
The aforementioned always on and never on lights on the playfield, And I want to reinstall the cousin mech that he previous owner disconnected and hardwired to the coin return button to issue credits!

Any advice for figuring out the intermittent power on prob, That would be a great help.

I sure will. Thanks for the redirect.