Replaced old nest with A0063. Wiring was the same but Nest has no power

[FurCat2026]

Replaced old Nest with Nest A0063, no power. We used the same wire setup. Nothing lights on the dial and AC not starting.

[Patrick_Caezza]

@FurCat2026 

It looks like you have the Nest Thermostat E, which features a white display, correct?

Can you post a picture of the original thermostat's wiring here?

When you made the switch, did you power off the HVAC at the breaker? If you didn't, you could have blown the fuse in the furnace/air handler.