My Korg Trinity Plus is acting super wierd

[Tapiwa Jeremy]

Hey there fam , I am new here and wanna learn so much so that I can save money for repairs that I can attempt to do by myself. I have a Korg trinity plus 61 and it recently started having audio problems. The two (1 L mono and 2 right ) outputs on the keyboard, work but sometimes cut out totally and somehow after leaving the keyboard for a while, somehow it starts working, outputs 3 and 4 dont work at all. Thw headphone jack port works and is significantly louder the first 2 I mentioned. Any Idea how I can go about it