LED Light goes on and off.

Hello and thanks for letting me in here.
I built this desktop about 1 1/2 years ago and it has been flawless until last week. It is more annoying than a big problem, but I was wondering if anybody can pin point what might be causing the LED to randomly go off, then back on. There have been no changes in the performance of the PC, I have checked the LED wires and all looks well. Any ideas? I doubt it is the mobo because there would be other issues I believe.

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Clarification Request
What is this LED connected to?

What if the LED is bad or the motherboard? Why not unplug it or change what it indicates by moving it to another connection?

Story: Long ago in the land of XP an update came down. It changed the way drives were selected for a slight increase in access time. Rather than deselecting the HDD this update left the drive "selected." Yes, faster but owners lit torches and brought out the pitchforks how it broke the HDD activity light. The end.

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I don't know if the LED is bad. It stays on for hours, then I'll look down and it is off. It doesn't flicker or blink. As far as the mobo? I have tested it and all is fine. The wires for the LED are connected to the 2 pins labeled LED. There is nowhere else to put them unless maybe I try switching them with the HDD wires?

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If it's just a power LED

There are other places we can connect it. Remember I don't know your tech background but if this is all that is wrong I would unplug it as an annoyance for now. There are replacement LEDs too many out there and we can't plug it directly into say a +5V line because it needs a current limiting resistor.

Without another LED we can't call it one way or another.

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Thanks for the response. I think I will just leave it be. My background as a tech is mediocre. Not a pro, but I built this with no issues. If there are other places to plug it, where might I look and how would I know how much voltage it is putting out. I do have a volt meter.

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Sorry but LEDs need current, a Volt meter
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OK, I understand - since this is such a small issue, I'll leave it be. Nothing else is wrong so if one day I get the urge, maybe I'll buy another LED thinking this one may be faulty. No way for me to tell.

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