When connected to a device it immediately turns off

Hello!

I have a problem with a JBL Xtreme speaker. I have had it for over 5 years. Now it keeps turning off, so I replaced the battery, but unfortunately it didn't solve the problem. I have also tried hard resetting the device several times. As long as I don't connect any device to the bluetooth it has no problems. With Aux it works perfectly fine. However, when I connect it with bluetooth it looks like it freezes and if the device is on charge the power button lights up white, if it is on battery it turns off completely. (I've tested without the battery, it doesn't work.) I've looked at several solutions but none of them work.

Anyone have any ideas?