Won’t come on
It’s doesn’t come on when pressing the on button
Released in 2017, the JBL E45BT are wireless on-ear headphones with Bluetooth 4.0 and 40 mm drivers, rated for 16 hours of battery life.
Does the red charging light turn on when you connect a compatible charger to the headphones to charge the battery?
It not it may be that the charge port is faulty or loose from the board and therefore the battery won’t be charged so that the headphones work or perhaps the battery is faulty.
Use a strong light and a magnifying glass to visually inspect the charge port to ensure that there is no obstructions preventing a good connection and that the pins are a;ll staright and parallel with each other and not bent, broken or missing.
Here’s a link to a video that shows how to open the headphones so that the port and the battery can be accessed.
My headphones wouldn’t power on either so I tried lots of combinations of holding the power on whilst holding the volume buttons, etc
I eventually managed to get it work again - I think I did it by holding the power, both volume buttons including the middle button all at the same time for a while. Then it just started to work again
hope it helps