Power keeps turning off and on

For the last few days my headphones have been making a popping/crackling sound, and have been completely losing sound. At first I thought it was the jack, but then I noticed that the red power light was flickering off and on as it did this popping sounds. After seeing that I removed the batteries and tried adjusting the spring contacts, that didn’t help. I’ve noticed today that it turns off and on repeatedly if I move the speaker side with the batteries around. I can get them to stay on if i hold them a certain way. I’m guessing its a loose wiring causing this, but I wanted to make sure before taking them apart to see.