HDD Thunderbolt 4GB NO POWER

My main external drive is not starting up. The light on the front does not go on, it does not make a noise, and it does not show up in my mac finder.

I swapped the electrical cable with the one that goes into my other G drive and it still did not start up. Is it dead?
Is there anyone who may be able to offer advice?

If this is the G-Drive w/ Thunderbolt and USB. Make sure you have it attached to a computer as well. The unit won’t power on unless there is both a power connection and an active data connection.

Thanks so much. The last comment solved my issue also.