DJM 250 MK2 'DC IN' broke

I have a DJM 250 mk2 mixer and since yesterday sound was only playing out of one speaker. I wiggled around the wire connected to it and it started playing out of both but when i did this the sound out of the headphone would be extremely muffled. I have tried different wires and tested out my headphones and monitors on different devices so it is different that input which is broke. Is there anything i can do to fix this?