[DEFECTIVE] Can't power on

Was working OK earlier today, has always taken a few goes to get it booting, and hasn't really been used much, but today I decided to install Windows 10, got the install done, but after powering off it hasn't come back. Have removed all peripherals, given it plenty of time to cool down (not that it got hot) but still zero power.

Tried a different USB C cable with a iphone plug charger, but nothing, and nothing lighting up when I plug in main charger

Is a Lattepanda Alpha 800 that shipping at the end of November 2018