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Installed new nest have had some errors popping up saying loosing power code 73 I believe this a new install with 5 wire lvt and common hooked up voltage is good etc thinking its a bad nest out of box

The E73 error says,

QuoteThe Nest thermostat isn't electrically detecting your Rc wire.

Rc is internally connected with Rh, so there's no need to actually connect a wire to Rc if you wired Rh.

QuoteUnlike most thermostats, the Nest Learning Thermostat does not require a jumper wire between Rh and Rc

The N73 error says,

QuoteYour Nest thermostat isn't electrically detecting your W1 wire, but one is connected to the Nest thermostat base.

Did you end up replacing the NEST?  Was yours defective?