Case Front Panel Wiring

February 25, 2009 at 06:28:05
Specs: Windows XP
Is there a way to determine the polarity of the little connectors that connect the front panel features?

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February 25, 2009 at 07:27:54
The only ones were polarity matter is the LEDs. The should have a little + sign near the positive terminal. Even if you plug them in the wrong way round it doesn't matter, it wont do any harm, it just wont work. All you need do is revers the connection.

The difficult one is likely to be any USB connectors. You are going to have to look carefully at the motherboard headers and any information that came with the case as there is no standardisation. Get them wrong and you could damage something.


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February 25, 2009 at 08:05:33
The female connectors on the wiring from the front of generic cases often have characters (letters and/or + or -) on one side that indicate what they are for. Some generic cases have a label stuck to the inside of the case that tells you which wires go where.

The female connectors on the wiring from the front of brand name system cases may have no such characters - they may be one piece and have the wiring to that configured to suit the headers on specific mboards. If you supply the brand of the case and model number or similar found on the case, I might be able to determine how the headers on the mboard for that model are wired up, and therefore which wire in the female connector((s) connects to what.

Other than that, we need a description of what you are seeing.

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February 25, 2009 at 12:35:33
In general, the positive wire for the 'power on' LED is green, the positive wire for the 'HD activity' LED is red. The polarity of the power switch and reset connectors don't matter. Other connections, as already mentioned, might vary with the manufacturer.

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February 25, 2009 at 13:26:22
If you look closely at the plastic plug, there *should* be a tiny triangle/arrow....that's the "+".

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