Which system do you use? Android, Ubuntu, OOWOW or others?
UBUNTU
Which version of system do you use? Khadas official images, self built images, or others?
KHADAS OFFICIAL
Please describe your issue below:
My Khadas has been working flawlessly since I received it. This morning I woke up and it was dead. No response at all on any of the buttons. Verified that power adapter is working and cable is good. Normally when I connect the power, the lights flash blue instantly and it begins boot. I am afraid that this is just dead. I am connected to a APC UPS so very clean power and PSU is 30W, have been using it flawlessly since I purchased it. Is there a repair/replacement option? I am crying so hard on xmas morning… And I have been a very good boy this year. 
Post a console log of your issue below:
I would not be writing you if I could get a log output. :)