> I get the shocks, too. Both of my 550MHz TiBooks do it, with 2 > different brands of power supplies. As my wrists rest on the leading > edge (the paint has worn so I'm touching some bare metal) with my bare > feet on my ceramic tile floor, I can feel the tingle. Lift my feet, > and the tingle stops. Without a grounding wire I don't see how this helps. I have the two prong power brick. I'll hook it up to an oscilloscope tomorrow morning, see what it says. There is a grounded outlet at one of the test stands. The reason I said shocks was because it was a bit more painful that I've ever felt. I know it's been discussed, and even remember older postings, but never put much thought into myself being grounded. I *think* that'd be the only way to complete the Ti->person circuit. Thanks, will report...