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Burnt AT Power Connector (0 Comments) (link)
 Tuesday, 10-July-2001  12:29:02 (GMT +10) - by Agg

This from DF: I was cleaning dust out of one of the boxes in my house when I decided to unplug the power connector just for the hell of it (fiddling) when I saw the burnt plastic casing of the plug. As the picture shows, the bun marks line up with the 5v wires to the power connector (red wire) indicating that it was getting hot due to high current density (lots of electrons, not enough metal, metal gets hot). This explained that problem where it would not boot all the time (inrush current, that's what I thought anyway), when really it was a bad connection. I pulled out the little metal tab, and sure enough it was a blue metal colour. I filed it clean, and bent the tab so it would push harder against the contact on the mobbo. The fact that this mobbo physically had alot of components plugged into it AND it was a Cyrix 233 would of contributed to this problem somewhat..

click to enlarge

I am amazed that this thing still worked properly (this thing is a CD-burning machine) without any problems, though I do recall bumping the wire while the machine was on, and it totally killed it. Now you see why the atx power connector was invented - it allows for 6.3amps per contact..

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