CD Player Outputting Out of Phase Mono

[cincyjack]

Odd probem with my Jolida JD-100 CD player.
The left set of RCA out jacks now puts out a mono signal that is out of phase. The right set works fine.
I noticed a severe drop in bass. Both stereo channels are present in both sides of headphones.
I popped the molex connector at the output jacks but see no obvious wire issues. All other wiring looks good.
Any idea what component failed. Component failure is rare in my world. Is it worth unwiring and rewiring the molex connections?
Big drag to send the unit in for repair but I need that second set of outputs.
Thanks.

 

[AnalogSteph]

You lost your ground connection there. Some poking around with the continuity tester / ohmmeter will be needed. Could be the jacks themselves, or a bad solder joint or trace.

 

[cincyjack]

You lost your ground connection there. Some poking around with the continuity tester / ohmmeter will be needed. Could be the jacks themselves, or a bad solder joint or trace.

Thanks.
I'm thinking it's the board.
Waiting on a pal.

 

[restorer-john]

You lost your ground connection there.

This is correct. Check the common L/R ground connection for the faulty set of jacks.

 

[cincyjack]

Sure enough, a broken trace was the culprit. Jumpered a fix.
I think a loose screw myst have contacted the bottom of the energized board.