Chuwi Larkbox not powering on even if it's connected to the power adapter

Hi guys, I am here because my Larkbox is good for a while but last week, it won’t power on (blue light is not turning on) so I can’t troubleshoot. Did I get the defective unit? What other steps I need to do to check what’s wrong. I am not afraid to open the computer if needed BTW. Thanks!