https://www.epo.org/en/service-support/faq/myepo-services/smart-cards/cryptovision-software/i-have-connected-my-smart-card

I have connected my smart card reader to my computer. How do I turn the power on?

If the green light on your smart card reader is blinking, that means your smart card reader is switched on.

If the light is not blinking, plug the connecting lead into any functioning USB port on your computer.