Wireless HP Keyboard not working - just ask for hotkey for reset connectivity

[Ivan_189]

Hi everyone,

HP Pavilion 27-d1001 AIO
My problem is very common, after i change batteries, my wireless hp keyboard don't work/ no reponse. 
No usb connector (The bundled keyboard doesn't has usb connector).
No any blocking non barrier problem or driver issue. One minute before, i can use the keyboard. One minuste later after chaning batteries, how will there be any new driver issue or barrier problem, right. No batteries problem, the cap lock light up (Although it turn off few seconds later but this just means the connection problem not batteries).
I actually faced the situtation year ago, my local hp support solved by providing a hotkey for reset connectivity of keyboard. It worked! But sadly, i forget it now. And my warranty expired. So, they will not tell/help me. But i don't want to join a new warranty just for this simple issue, especially for this over 3-4years old pc. 

Please, anyone know the hotkey? 

[Ivan_189]

Further information:
*No connect/reconnect button on this keyboard
*No keyboard model. This is bundled HP white wireless keyboard of this All in one model.