Won't turn on

Hi

If it’s showing no signs of life it could be caused by many different things such as

A bad/dusty charging port,what I would do is make sure the charging port is free from dust debris and corrosion,if any is found I would use some fine tipped tweezers to remove the dust and debris then clean away everything else with some isopropyl alcohol and a toothbrush or a Qtip/cotton bud

If that doesn’t work I would start looking towards the main board and battery, here’s a disassembly guide

JBL Pulse 3 マザーボードの交換

I would check the board for anything off like corrosion or any form of damage,if anything is corrosion is found I would clean it away with some isopropyl alcohol and if anything damage is found let me know about it in the comments and il tell you how to fix it accordingly:-)

After that it’s most likely a bad battery that will need replacing

Hopefully this helps

Any questions please ask

Thanks:-)