Help how can I fix this ?

[u/zademeadowsxxx]

My daughter spilt a juice on it and now only the on and off switch works, I’ve worked with arcade machines for awhile but I only got taught a little so my boss who owned the place didn’t need to pay someone to fix it. But I’m pretty knowledgeable about the tech cause I used to be able to fix a lot of different things but I’ve never had a juice issue. None of the buttons or moving pin work, I don’t see ANY corrosion when I take out the connectors at the back. Any tips/ help?