Power LED on when system is off.

**Doctor Feelgood** · Posted: Sun, 12 Feb 2006 00:22:31 Post Subject: Power LED on when system is off.

Ever see this?

When I turn the power to a system in a new case off, the case power LED comes on. When I start the system, the LED goes off.

Thinking maybe it was just wired backwards (which didn't make sense at all considering what was happening), I reversed the wires to the motherboard header. Now the LED is off when the system is off, but is so faint when the system is on that you think it is still off.

Any ideas? Bang Head

BeerCheeze · Posted: Sun, 12 Feb 2006 00:39:32 Post Subject:

Don't do drugs... stay in school.

Laughing

**Doctor Feelgood** · Posted: Sun, 12 Feb 2006 00:41:29 Post Subject:

OK, I did both things you suggested and still nothing. Bang Head

Anyone else? Laughing

HackaX0rus · Posted: Sun, 12 Feb 2006 02:53:00 Post Subject:

backwards connector?

T-shirt · Posted: Sun, 12 Feb 2006 03:36:08 Post Subject:

Nope, LED are polorized and it's a DC current so it SHOULDN'T be on at all with the connector reversed.
The fact (if we can trust BB's observation) indicates a defect.
Assuming you have the right header do you have a spare LED/wire/plug to recheck that the MB is normal? if so
I'm guessing a factory miss/crosswiring in the front panel harness or a MB to case short or a PSU defect, in order of probability.
None are good. Might be RMA time

LaTech · Posted: Sun, 12 Feb 2006 12:14:39 Post Subject:

Yeah...what t-shirt said. It's like it's getting power incorrectly. Potential bad mobo!

**Doctor Feelgood** · Posted: Sun, 12 Feb 2006 12:51:17 Post Subject:

I need to check the PSU... I am unsure it is good, but everything other than the case is old and has been working for years.

T-shirt · Posted: Sun, 12 Feb 2006 16:23:40 Post Subject:

**Doctor Feelgood** · Posted: Sun, 12 Feb 2006 16:53:44 Post Subject:

I'll have to take a look at the front panel I guess... A few PSUs all do the same thing. I even put those paper washers in around the mobo screws... Laughing

I will scrounge for a separate LED to test, too.

I am now also noticing that alomst any time I touch the case I get a little shock... not good.

But, why is power even available to the LED when the power is killed?

LaTech · Posted: Sun, 12 Feb 2006 17:15:57 Post Subject:

You have a short somewhere...

That, or it's winter time and you need a humidifier!