April Beacon 305 is no Longer Detected?

Hello,
I am working with April Beacon 305 but since last week it suddenly stops detecting.
i connected it with all the PCs but its not detected at all.
What Should i do to solve the problem?

Thanking You.

Do you use iPhone? You can install the app LightBlue to check device. It should display a device named “ZeroBeacon”.