Keypad lights but no activity

Heard a "pop" last night, checked everything around the iMac and the only thing not working correctly was the bluetooth keypad extension on the keyboard.  Get a yellow light when I push reset, green when turned on and off.  But no key action.
Is it possible something gave out in the keypad but some functions still remain active?  Any way to test it short of maybe going to an Apple store?
Thanks.

I attempted to connect using DHCP, but that returned an error message, which suggested I contact my service provider. So I did that. Based on my type of modem, the rep said I should be using PPPoe. In the airport utility I reset it to PPPoe.
The problem was solved, but shutting everything down. modem, airport, and mac.
Restarting modem. waiting for all lights
restarting airport.
restarting mac.
The mac found the airport, and connected with the timer running, ethernet did NOT connect, which was happening before, somehow.
Browse to web pages worked.
Now I have to sort out the printing.

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