Yes, I reset the PMU again, and reinstalled the 4.9 combo pack. I've done a hardware analysis, and disk & permissions repair form the OS install disk. No difference noted.
I have noticed that the custom settings in the System Prefs/Energy have no effect on sleep. the only way the OS sleeps is if I close the lid, or use the Apple menu option. This could mean the there are corrupted files, or somehow the energy settings aren't being received by the HD. I think I'll try a archive and install to see if an OS replacement will cure the issue. Otherwise, I'll have to send it off to the "depot" for a new HD.
I'm traveling for two weeks, but will check back in to this thread as I stumble along with the problem.