Fire? CPU burnt?

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MistahYebba

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Jan 8, 2013
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So, I needed a card reader and my old CPU case came with one installed, and after removing some of the plastic paneling, screws, and wires, I was able to detach it from the unit it was on.. (same unit as the power button). Obviously this was not meant to be detached from the case, but I figured if I could ground it onto my current computer it wouldn't be a problem.

Plugged it in to one of these..
USB_2.0_-_internal_male_connector-top_PNr%C2%B00367.jpg


It was a 4pin female plug, and fit right on the top row.

The second I gave it power it started smoking. I wanted to see what part of it was smoking, so I took the whole thing apart and gave it power again. Sure enough, the CPU erupted in flames like a christmas tree for a second.

Obviously I cut the power but I'm just wondering what caused this..?

I'll just go buy a proper card reader for like 5 dollars, but I was just curious.
 
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nukemaster

nukemaster

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Nov 23, 2004
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You image looks like a USB header, Just what a card reader would plug into, but How in the world did the cpu smoke from that. The usb system is supposed to be protected with a fuse and all that good stuff.

I think you may have damaged MORE then just the cpu,

You have any images of the reader it self and its plug?
 
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nukemaster

nukemaster

Titan
Nov 23, 2004
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Ohhhh, well that makes more sense, I though somehow you burned an actual cpu by this.

Well, I guess it was worth a try to use the the card reader. I know I have transplanted card readers from HP systems in the past with no issues, but all readers I have used are power from the usb connection it self(the 2 outer wires are power while the 2 inner are data).
 
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M

MistahYebba

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Jan 8, 2013
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So how do you think it happened? It was after all always connected to my other computer, and I have used it for a while. Somehow randomly when I take it out of 1 computer and put it into another it freakin' EXPLODES!? Haha.
 
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nukemaster

nukemaster

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Nov 23, 2004
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Ok, well I am at a loss as to why it would fail. ALL usb ports push out 5 volts so a reader from one system "should" always work in another.

The only way I can see this happening would be if the card reader was somehow connected to a firewire header(pin wise they look the same firewire tends to be RED, but i have even seen RED usb or both in black).

Backwards may have hurt the reader too because the ground and power would be reversed.

Firewire would go sending 12 volts into the thing and cause all kinds of fun.
9.jpg
 
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