Please try unplugging the switch for about fifteen minutes, then plugging it in again.
If the issue persists, disconnect the switch from your TV, and the other devices that are normally connected to it. Plug the switch into one device at a time.
If the issue returns when a particular device is connected, it’s possible that device is either defective or incompatible with the 501BN. You can test the device in a different port on the 501BN to make sure the issue isn’t caused by a bad port on the 501BN.
If the issue still seems to be with the 501BN itself, please contact our support team for help.