keyboard started playing up, repeating keys at random times so changed battery in keyboard. Now it doesnt work at all. Have removed both USB dongles and replaced each in turn. Both were detected by OpSy and were auto installed. Mouse is working, as it always has. Keyboard is dead. Batteries checked with meter and all good. Suspect that (1) I have missed something easy, or (2) keyboard is dead or for some reason batteries not making connection. Any help appreciated.
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