Headphones not working, turning off after entering pairing mode

Hello,

I have finally found my JBL headphones again after almost a year of it under my bed in hiding. I was searching for a long time and was considering getting new headphones until I finally found it.

However, they didn't work before when it was charging. Tonight, Mom tried to get it fixed, as the headphones were showing a blue light. But when the headphones enter pairing mode, they shut down almost immediately afterwards.

I'm starting to worry if the headphones are toast. The headphones have been collecting dust for the entire time they were under there, and the current issues my Mom is pointing at here is the charger, or my tablet (she says I have multiple things open, I only have one tab as I'm typing this).

So are these headphones still useable?