Building a new PC and need power button +/-

Dell Dimension™ 2350 desktop
December 4, 2010 at 18:17:47
Specs: Windows XP Version 2002 SP 3, Intel Pentium 4 3.2 GHz 4 GB DDR2 RAM
Bought a new motherboard to put it what was a Dell Dimension 2350, except the board socket for power button doesn't match the plug with the wires. I bought a thing at Radio Shack that I can just put the cut and stripped wires into a connect, but I don't know which wire is + or - (green and black) I don't even really know if it matters, but the MB manual has one pin labeled for + and one for - Which wire, green or black, and + and - for power button?

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#1
December 4, 2010 at 19:57:36
Do NOT cut any wires!! All you have to do is release the wire/plug ends from the plastic plug. Look closely at plastic plug & you'll see openings along the side. If you move the wire back & forth in the plastic, you'll see that each individual metal plug end is being held in place by a plastic tang. Carefully lift the plastic tang with the end of a pin or something similar & the wire will pull out of the plastic. Then all you need to do is plug each wire onto the correct pin on the board.

The power button is a momentary switch like a doorbell button, it has no polarity so there is no + or - to worry about. Same goes for the reset button. Some of the other plugs DO have polarity & must be connected correctly. LEDs will not work if wired backwards but they won't be damaged. If they don't light up, simply reverse the wires. The front panel USB & firewire (if you have them) MUST be hooked up correctly or your USB/firewire devices will fry.


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#2
December 4, 2010 at 20:05:58
Thanks for the warning, but it was too late as far as "Don't cut the wires". Already did, fearing worst case having to direct solder them to the pins, but got lucky at radio shack and found some connectors that the cut ends go in one side and they fit the pins perfectly. As far as +/- I know in a normal switch polarity is irrelevant, I just wanted to make sure here because in the manual for my MB it labels the pins as "Power Switch -" and "Power Switch +"
One more question though, will the computer care if I don't hook up the LEDs? Will it sense that they aren't there and give me an error? What If I don't have a reset button? I assume I can just leave that empty it will just NEVER detect a reset command.

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#3
December 5, 2010 at 07:09:23
No, you don't have to hook up the LEDs but why wouldn't you? Live & learn, but if you would have paid attention to the way the plastic plug is designed, you could have saved yourself a lot of grief. BTW, if you would have soldered the wires to the pins, you probably would have trashed the board.

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#4
December 5, 2010 at 13:56:28
I almost had to solder right to the pins, but got so lucky at radio shack when I was there getting heat shrink for the solder points. They had these little connectors that are basically the ones I accidentally cut off. Just got the wires connected and the computer booted up fine. I am going to simply pull the wires out of the plug for the front USB connection though- I have learned from that mistake. Thanks a lot for your help

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