My keyboard ran smoothly from the very beginning and the batteries have not made the same limp. Now it is already happened to me the 2nd time after battery replacement, I could not get up and running, the keyboard and since I have now "again" figured out after a long try, why that was, I want to document my knowledge here. ;-)
Phenomenon: The keyboard is simply not on - no matter how long I press the on / off switch. The green light comes on briefly, then everything is dead. Even pressing the Pairingbutton on the back has brought nothing.
Solution: Do not force the Pairingbutton but easily pushed aside. If you look closely, one notices that the off center sitzt.Schon flashing the orange light. Now in the Control Panel as a Bluetooth device install as usual and hey presto it ....... runs. :-)
Hope you can help this tip!