You may have a coolant leak that conducts electricity from the PSU to your USB device. Just an insane thought, but it happened to me. Has the computer had any wierd operation? Sent from a computer running either the SPARC, Itanium, or PowerPC architecture.
On Tue, Aug 17, 2010 at 11:20 AM, Jonas Lopez <[email protected]> wrote: > This is from out of phase ac connection, you would be wise to get a plug > checker at the electrical store, they cost about $ 5. with lights to tell > you the wiring error, but you still can cause this even after the check > passes the wiring by using non-polarized plugs. > > This is a quick fix. > > Also, in the primary of the Mac power supply is a resistor and a capacitor > that need to reduce RFI but that can be only parlty connected, try a > different Mac to see if it sparks. > > JML. > > >On Aug 16, 2010, at 7:58 PM, Kris Tilford wrote: > > > >> I've got a G5 PowerMac which has the full metal case. Last night I was > plugging and unplugging a powered USB hub in the dark, and I noticed that > simply touching the metal of the USB plug to the metal of the case caused a > small visible spark between the plug and the case. This seems wrong to me, > and I'm a little worried. The spark was very tiny, but it was consistent, > and wasn't enough to do anything abnormal like pop a fuse or ruin anything. > The hub works fine still, but somehow this seems wrong. Has anyone else seen > sparks between USB plugs and their cases? > >> > >> > >I've seen it on one of the Cubes and it's unsettling so I'm very careful > about plugging in live now. I did ruin a TiBook with a power adapter 6mos > ago. > > > >John Carmonne > >Yorba Linda USA > >Sent from my MBP > > > -- > You received this message because you are a member of G-Group, a group for > those using G3, G4, and G5 desktop Macs - with a particular focus on Power > Macs. > The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > For more options, visit this group at > http://groups.google.com/group/g3-5-list > -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
