[megaimg]

Bellow, pictures of the MXE board short that damage the front panel. For me, the issue was on this board....or do you guys think that the PSU was the problem and send a over current to the socket? Must be a circuit to prevent this...so I dont think is the PSU...anyone have this issue before!

   
   

[vishnu]

Yikes! This looks like a classic bridge short, the gold leaf on on one side pealed up and folded over onto the other connector. And no, there's no protection in the power supply to suplant this type of failure, Octane power supplies provide many amps, this failure probably only conducted an amp or two before it snuffed. If you're careful you might be able to fix this with traditional home-brew circuit board prototyping supplies, it may have happened so fast that none of the integrated circuit gates were damaged.

[megaimg]

Yikes! This looks like a classic bridge short, the gold leaf on on one side pealed up and folded over onto the other connector. And no, there's no protection in the power supply to suplant this type of failure, Octane power supplies provide many amps, this failure probably only conducted an amp or two before it snuffed. If you're careful you might be able to fix this with traditional home-brew circuit board prototyping supplies, it may have happened so fast that none of the integrated circuit gates were damaged.

So you agree that was the board...yep, suck that damage the Front Plane....

[Irinikus]

It is concerning that its on both sides of the connector. I have a broken V12, which suffered a similar fate and I think that it's a fault on the card. Those connectors are the power rails for the card and a failure on the card itself could cause it to draw excessive amounts of current!

[weblacky]

This is odd, while I've not looked at detailed at Octane, SGI normally uses polyfuses to break over current situations and resistance to limit current draw. The fact that this could happen is odd..I'm wondering if this is a localized connection issue, a component short, or something like an errant trace folding over or debris making contact across traces.

I don't have the practical experience to tell but the fact that it's symmetric means something. Localized heating is normally due to contact resistance issues at the point of heating (burning). But I'm wondering...

Are you sure you were completely seated before power-on? Not out just a little (jammed or otherwise unable to be perfectly flush) when you seated the XIO assembly?

To my eyes, this looks like poor contact during initial power-on.

[megaimg]

This is odd, while I've not looked at detailed at Octane, SGI normally uses polyfuses to break over current situations and resistance to limit current draw.  The fact that this could happen is odd..I'm wondering if this is a localized connection issue, a component short, or something like an errant trace folding over or debris making contact across traces.

I don't have the practical experience to tell but the fact that it's symmetric means something.  Localized heating is normally due to contact resistance issues at the point of heating (burning).  But I'm wondering...

Are you sure you were completely seated before power-on?  Not out just a little (jammed or otherwise unable to be perfectly flush) when you seated the XIO assembly?

To my eyes, this looks like poor contact during initial power-on.

it was flush in and tide with the screws...