Nest 3.4 issue with thermostat

[VMV3]

My Nest 3.4 thermostat suddenly stopped working. The screen on the thermostat is black with no info displayed 

[Derickf]

Hi @VMV3,

Thanks for reaching out to the community. I'm sorry to hear that your Nest Thermostat has suddenly stopped working and the screen is completely black. I'm happy to assist.

To gather the necessary information, please answer the following questions:

• What type of Nest Thermostat do you have? The following article might be helpful: How to tell which Nest thermostat you have.
• Is the Nest Thermostat showing a blinking red or green light?
• Does the thermostat charge with a USB cable?
• When did the issue first occur?

I'll be waiting for your reply.

Best regards.

Derick.