Why is contactless reader not working

[Marlee]

I have 2 readers and none works now. Even when I plug them in. Nothing comes on. No light on reader. They are just blank blank blank

[RHatch]

Press and hold the Power button for 20-30 seconds to reset them.  Then see if they will charge or pair after that.  

[Tom]

Thanks for helping out with this, @RHatch — and sorry for the trouble, @Marlee. 😐

If you're still encountering any issues, these troubleshooting tips may help clear things up as well (see Kelly's reply): What are the troubleshooting steps for the Contactless and Chip Card Reader?