While looking at the parts I salvaged from my old Proliant server, I came across this cap on the VRM board for one of the CPUs. The top is still perfectly flat with no signs of bulging, and yet I can see brown stuff round the edge and in the Y-vent channels.
On the picture, it's the one on the right, and it's a Chemi-con LXF cap.
There are a couple of other points of interest: firstly, the flat-top cap on the left (OSCON) appears to have a brown mark on it as well. This looks more like a mark done by the people at the factory with some kind of crayon. I wonder if the other cap was marked like this, and the particles of crayon have just fallen into the vent due to vibration?
Additionally, part of the torroid coil looks like it originally had a blue sheath. This has now been burnt away, as if the coil was running too hot.
This VRM module and its associated CPU is no longer in current use - the Proliant server having been replaced with a Mac G3 server a few months ago. I wonder if this cap is bad, could it have contributed to the demise of the SCSI HDD and/or controller?
On the picture, it's the one on the right, and it's a Chemi-con LXF cap.
There are a couple of other points of interest: firstly, the flat-top cap on the left (OSCON) appears to have a brown mark on it as well. This looks more like a mark done by the people at the factory with some kind of crayon. I wonder if the other cap was marked like this, and the particles of crayon have just fallen into the vent due to vibration?
Additionally, part of the torroid coil looks like it originally had a blue sheath. This has now been burnt away, as if the coil was running too hot.
This VRM module and its associated CPU is no longer in current use - the Proliant server having been replaced with a Mac G3 server a few months ago. I wonder if this cap is bad, could it have contributed to the demise of the SCSI HDD and/or controller?
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