I have a Picade Maxi from the kickstarter campaign a few years ago.
I have a working RetroPie v4 on a Raspberry Pi 3.
The problem is that the speaker don’t seem to get enough power from the Raspi USB port. The are just silent.
When I connect the Picade PCB with a USB charger directly, then the speakers work.
So it seems that the speakers don’t get enough power from the Raspi USB port?!
I already tried the /boot/config.txt setting to get more power from the USB port. But it does not seem to work.
max_usb_current=1 # give up to 1.2A to USB devices (newer firmware)
Can I power the PCB somehow without the MicroUSB port?
Are there other ideas what I could try?