Every pre-soldered Zega Mame Gear is fully tested prior top shipping including:
If you do encounter any issue DO NOT START CHANGING SOFTWARE SETTINGS
Your TV / Monitor may not be able to display the low default resolution if using an older pre-configured image. You can edit the boot/config.txt and increase the default resolution or try using the newest base image available through the Downloads area of the website.
Please ensure the battery polarity is correct. Not all battery connectors are the same. Double check the ensure the red battery wire is going to the + pin on the Power Board.