Thank you both, so far, for your replies. No, I didn't perform a bypass to the powersupply because I have had to defer to the header2 on six of the ten workstations on this particular job site. Acer FAQ page is how I determed changing headers as opposed to fan chaneout on the first of the machines to act up. And I have had no recurrance on any of the other machines. This particular one though, is strange. When I went back to fix this one the second time I took a new fan with me, but just to amuse myself I decided to revert back to header1 before replacing the fan. And guess what? It worked!! Since then, it did the same thing again and I had a surrogate swap it back once again...and guess what? It worked again!! I kid you not; when you swap the header it works...shut'er down swap back, and the header is dead. This is a true intermit that the header dies, and then comes back to life when the other dies; back and forth. There has to be an answer...my best guess would be BIOS confusion because when a solder trace is interrupted it stays interrupted, right?
Edited by KDawg360, 22 July 2008 - 06:57 PM.