plugable UD-3900 not working

Simply doesnt work.
The blue light turns on for two seconds, then goes off and it is all dead.
My lenovo Yoga 2 pro does register the connection, and windows update downloads the drivers etc (windows 8.1)
Everything else is dead.
No lights on the front of the docking station (DS) except for a second when unplugging/plugging.
I have connected a screen to the DS, but windows does not find it.
Searched devices with windows, but no DS found.
Plugged a mouse on the back of the DS, nothing happens.
I unplug the DS from the mains, and my laptop registers the disconnection with a sound. Plug the DS back onto the mains, and the blue light at the front goes back on for seconds, then off.

Problem solved.
The mains adaptor was faulty, substituted with a universal laptop adaptor I had at home.

Hi Carlos,

Glad to hear you got it sorted out!

Please email support@plugable.com with “Ticket 83797” in the subject as well as your Amazon Order ID number and your preferred shipping address, and we’ll have a replacement adapter sent to you.

Thanks!
Gary