Newb Alert!!

Hi. I have an Astro City loaded with hundreds of games.. but am experiencing some technical difficulties and would appreciate any helpful advice!

1. The monitor produces a darkened screen, intermittently when playing a game and the only way to correct it is to bang on the side of the cabinet (like Fonzi from Happy Days!). After a few goes, the display will be normal again until the next accidental bump of the cabinet (or pushing the buttons too hard). I can post pictures if this would help..

2. One of the buttons on the 2 player side is firing even without being pressed.

Both issues very annoying but possible easily corrected with some advice from the right people!

Thanks very much.. baha74