/diy/ - Do It Yourself

I dug out my sister's old-ass keyboard. The sound works fine on the inbuilt speakers but is terrible when I use headphones - one ear barely works and there's a staticky sound accompanying each note. I opened it up hoping there'd be an obvious bad connection but no luck.

What are the odds of somebody with no electronics experience fixing this, or should I just get a new keyboard? Pic related is the problem board, in case it helps.