Mono - No stereo

[shrimpeater]

what usually cases this? I had everything working ( so I thought) and once I got the juke back together and amp mounted I started jamming. Almost... I noticed the right channel not working. So I opened her up and switched to mono.All works. So It;s not a speaker issue. I'm guessing the amp. 
I have an extra,so what part(s) should I look at swapping out?

[jukenorman]

I could be anything from the mono/stereo switch back including phono cartridge and wiring.

Norman.

[shrimpeater]

Snap. It was the stylus. I reseatted and works fine now.
Project complete