I was unable to pair a magic trackpad with my home computer, which just wasn't seen. Also, an Apple wireless keyboard paired but keeps losing connection. I reset PRAM, SMC and the problems persisted. Both peripherals (new) are working fine on my office machine, which is almost identical to my home computer. Does this sound like my bluetooth on my home machine is failing? How can I test it, and if it is not necessarily failing what could be the cause of problems? Perhaps multiple attempts to pair new devices corrupted something? Any prefs files that might be relevant? I'm looking for possible fixes which don't assume a Bluetooth hardware problem. Ideas appreciated.