Wireless keyboard and mouse not working
I have an iMac G5 with the wireless keyboard and mouse. The iMac does not have the blue tooth card inside. The keyboard and mouse have worked fine for about 4 years. I had not turned on the iMac in about 10 days and when I did no keyboard or mouse. I replaced all batteries and the lights blink but will not pair. The key caps green light does not even come on. I have an old USB mouse and it works fine, but I can't find where to get the computer to try to pair the keyboard or mouse. Any help would be appreciated. Thanks.
MacBook Pro, Mac OS X (10.6.2)