Hi! I have run a duster over my keyboard and assume I have in advertently turned something off/locked something as not working but can't work out what!

The keyboard is still showing as connected to my laptop by bluetooth

When I turn it off and on again the blue power light comes on briefly and its fully charged.

The number lock light isn't coming on but the same light for bluetooth (1) is, as are bluetooth 2 and 3 lights

Very many thanks in advance for help