Has the keyboard worked OK before?
What type of computer is the keyboard dongle connected to, an Apple computer or a Windows PC?
If a Windows PC does the dongle show up in Device Manager when it is plugged into a USB port?
If the dongle doesn't appear in Device Manager then it is faulty.
If the dongle is shown in Device Manager, try downloading an installing this WiFi sniffer program to see if the WiFi is even working. It should show as a network.
To prove that you're looking at the correct one, turn off the power to the keyboard and unplug the dongle and check if it disappears from the list of WiFi networks shown by the program. Then plug in the dongle and check that the WiFi appears in the list again. If it does then the dongle is working.
Next unplug the dongle and turn on the keyboard and check if a WiFi network appears in the list. (not sure if you have to press a key or not). If nothing is shown at all then there's a problem with the keyboard.
If both the dongle and the keyboard appear to be working as far as WiFi is concerned then being unbranded makes it difficult if it is just a driver problem. Look in Device Manager when the dongle is plugged in, for the PID and VID numbers of the dongle. Right click on the dongle listing > Properties > Details > Device properties > hardware ids and find the PID and VID numbers. They should give you the manufacturer and model of the device so hopefully you can get drivers for it (if they have a webpage that is ;-)
The above is if it uses the standard 2.4GHz or maybe 5GHz WiFi band, but perhaps it is a different frequency who knows. So maybe finding the PID and VID numbers may also help with this to find the make and model number to hopefully find out more about it.
I don't know Apple OS so maybe @danj knows if there's a similar WiFi sniffer program that can be used in Apple OS to check if the WiFi is there or not. (Also maybe the PID and VID numbers for the device) ;-}
Cette réponse est-elle utile ?