iMac Key-board and Mouse don't work together

Today when I put my iMac On I find the Mouse and the Key-board are not responding; their green light blink. I changed the batteries, in doubt; but still they don't work. Can any of you guide me out of this riddle.My iMac OS is OS X 10.8.2.Thanks.

It sounds like they are no longer paired to your iMac. Try re-pairing them.
https://support.apple.com/kb/HT1809

Thanks. I don't have any MacKeeper.
But putting off the power switch, I returned after few hours everything was normal.
Mayil

Mayilvahanan said:

Thanks. I don't have any MacKeeper.
But putting off the power switch, I returned after few hours everything was normal.
Mayil

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Good to hear. It sounds like the bluetooth radio stopped working for some reason. Maybe it overheated or had some other electrical fault occur that required a reset. Anywho, if it continues to work, so much the better. If you find it recurring again and even regularly, just be aware that you may have hardware issues.

Thanks

OK I will be watchful.
I hope nothing more happens !
Thanks a lot for the guidance.:Blushing:

You know in this day and age of wireless kb and mice/trackpads, it is a great investment to have a wired set on hand for these little hiccups.

You are absolutely right. Thanks