nest thermostat blank screen

[tony_cavanagh]

I have a nest 3rd gen learning thermostat working for almost 2 years and the screen has gone completely blank. it is mounted correctly but screen is just black can it be an issue with the thermostat? 

[Anonymous]

Have you tried to charge the display with a micro-USB cable? If not, charge it for an hour and check if your display will turn on.

[RXShorty]

Hi @tony_cavanagh 

Does your heat link still show a light?
My thermostat stopped charging because of a defective heat link. 

[tony_cavanagh]

hi yes so the heat link top light is yellow/orange and the other two are green, i just looked that up and that shows defective heat link i think?

[tony_cavanagh]

thanks i will try charging with a cable but wonder why is that required as should be charging on the base?