I have quite a few (12) Lytecaster Recessed Downlighting 2000LVR low voltage units. http://www.mmlighting.com/store/PPF/par ... e_info.asp So far three units (they were installed in 1995 & 96) no longer function even when new bulbs are installed. I wondering if anyone has experience with these. The manufacturer says I need to use a voltmeter to test the sockets, and then bypass the thermal protector to see if that is the problem, but this means removing the whole unit. Any ideas?