Hey everyone I'm new here! Sorry if i have posted in the wrong section.
I have recently purchased a Space Jam SEGA machine.

I have a couple problems I'd like to figure out

1. When the machine plays certain noises I'm getting a crackling sound from the speaker it doesn't sound nice at all
High frequencies and crackling noises sputter out of the speaker. This only happens for certain sounds not all the time?
Do we think this could be a speaker problem. Someone I have had look at the machine before thinks it may be something like a capacitor on the sound board to be replaced?

2. There is a section on the machine called the Wabbit Hole. I have put a small metal plate protector over the hole to stop it from damaging the play board.
The only problem is this metal plate sticks up a little and the ball will hit the edge of the plate instead of rolling over it. Is there a solution or type of glue or silicon anyone would recommend sticking that plate down with so it is more flush with the play board.

Many thanks I will attach pictures tomorrow

Richy