***Hello,***
I am experiencing an issue with my ***Marshall Major IV*** headphones. When I plug them in to charge, the indicator light turns green after about a minute, which seems to indicate that the battery is fully charged. However, as soon as I unplug them, the headphones do not turn on at all.
I have already tried several troubleshooting steps:
* Using different USB-C cables and power adapters
* Leaving the headphones charging for several hours
* Attempting a forced restart by holding the power button for 15 seconds
* Trying to turn them on while they are plugged in
* Testing them in wired mode with a 3.5mm jack cable (which works)
Despite these attempts, ***the headphones refuse to turn on*** and only function in wired mode. Thank you in advance for your assistance.