[DEFECTIVE] Latte Panda stopped getting power

Hi,

I got my panda via Kickstarter and was using my Latte Panda over the day,
I wanted to resuse it in the evening,
now it doesn't do anyting anymore. Event the Power LED is not flashing anymore.
I tried the Power Supply from the Nintendo Switch too, it didn't do anything
The Battery removement didn't solve it too.

Is there anything I can do?

regards devzero