There WERE fuses there. The apps engineer pulled them and replaced them. He just didn't send them home for investigation. And he didn't check OTHER fuses in the system, although they must be working or the machine would've still be offline. I'm leaning towards this being an incredibly unlikely series of events, unlikely to be duplicated and probably not something we'll ever see again. I'm going to talk to our supplier, find out if they've heard any complaints about "broken" fuses elsewhere, and see if they recently changed fuse manufacturer/supplier. Otherwise I don't think there's much to be done- it's not a HUGE problem, since it's something we're aware of now and if something similar happens on delivery again, we will know right away to check those fuses. It's good to know that nobody here has heard of this or has an "easy" answer for it. Mike H. On 10/13/06, Shawn Wilton wrote: > Let's face it people. It could have been nearly anything that caused those > fuses to die. It could have also been that the people installing the > machine didn't even put the fuses in. We will never know as there are no > fuses to test. > > Could it be mechanical vibration setting up a resonant frequency that > > caused the fuses' wires to shake themselves to death? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist