Did you solder the Diode ?
What Voltage to you supply to the adapter ?
The light should turn on even without a Computer and just a Mouse attached.
Did you also try another Mouse ?
maybe the mcu programing is defective ? do you own a isp programmer ? or esd damage ?
3$:
http://www.ebay.com/itm/USBTiny-USBtinyISP-AV … UgAAOSwTA9X4Oxq
Can you please provide Pictures of your Build ?
Whats really sucks is the part vendor supplied me with 2 different dcjacks so there two versions out now.
i would recommend to simply remove the damn connector of the powersupply and solder your own for few cents.
This is simple design error, the drawing was wrong connected and i havent noticed it.
But all Roland Equipment also use this Polarity.. and many audio components also.
Sorry i'm busy these days.. too much work, no time left 😒