I think my Topping D30 RCA output became disconnected. Repair or replace?

[Hilkang]

I yanked the RCA cables off and on again a couple days ago when I was troubleshooting something and I haven't gotten sound out of my D30 since. I think it's because I was using short inflexible RCA cables. The jacks are loose. It connects and shows up in my audio midi setup and stuff. Should I open it up, have someone else open it up or make a sideways or slight upgrade to something like a Schiit Modi 3, Ifi Zen DAC or a Grace SDAC? I've used the D30 with a JDS Atom happily almost everyday for two years now and I have to say that after a couple days of going out of my computer's soundcard I'm not having a good time.