New Op-z won’t switch on

My new OP-Z just arrived this afternoon but it won’t switch on - I’ve charged it and it is showing fully charged but as soon as I unplug it from the USB it is dead. Anything I can do or should I send it straight back?

Are you able to enter the boot menu?

I’ve decided to send it back, it is brand new and should at least switch on. I hope they have another in stock that they can send me.