USB Pin Layout for Intel E210882 MOBO

I'm doing a case switch for a friend, but the USB cable from the front panel is wired differently than the motherboard's USB header pins. I cannot find any information on this board to find out what the exact layout of the pins are to change the harness. The board is labeled as an Intel E210882. I can run Everest to get the exact model...I've heard that this marking of E210882 is common on different boards.

Anyway, The USB cable has a jack with a 10 pin layout. There are 4 wires on each side of the adapter, Red, White, Green, and Black...two of each color. I'm assuming one group of these wires (R,W,G,B) correspond to one USB ports on the front panel.

The original layout of the adapter was White, Red, Green, Black, Empty...on each side. With this setup, the machine would completely freeze when any USB device was attached. The only diagram that I found online showed a setup of Black, Green, Red, White. I took a chance and rewired the harness. Now, when I plug in a device, nothing happens. My device has a blue LED to indicate power...but it does not light up.

I don't really want to take another chance and was hoping that someone out there has an idea of the correct pin config for this board. I'll run Everest and post any more findings!

Thanks in advance for your help!
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mjgreenleyAsked:
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CrystalMethodCommented:
The 5V line is the one that you really don't want to have in the wrong place. I've had clients hook the connections up wrong and fry motherboards.

If you're at all in doubt, live without the connection. A 5.00$ extension cable could save you the price of a motherboard.
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mjgreenleyAuthor Commented:
So, Everest didn't help much...well...as much as it could. It shows the motherboard ID as <DMI> and the motherboard name as Dell Demension 4600i.
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CrystalMethodCommented:
Here's the manual for your motherboard. The pages you need to look at are page 21 and page 33.

http://downloadmirror.intel.com/15210/eng/D845GVSR_ProductGuide_English.pdf
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dbruntonCommented:
May be of use to you as well in case you have to test.

http://www.usbman.com/Guides/BelkinMotherboard_cable_assembly.htm

A multimeter should be able to identify the +5 volt line for you and probably earth but read the comments at the link carefully.
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mjgreenleyAuthor Commented:
CrystalMethod: That's perfect! Thanks for the link. It looks like whoever assembled the case wire reversed the white and red. I'll configure the harness to the specs in this manual and let you know the results.

dbrunton: Thanks for the link: it's actually the exact link I found when doing some research on this earlier in the day. Very useful information! Thanks for posting it...I'm sure it will help others when they find this thread!
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mjgreenleyAuthor Commented:
So I switched the wires in the harness to: Red, White, Green, Black, Empty..and it's back to freezing after plugging in a usb device. Any thoughts? Is it worth trying to switch the green and white? ...could they be reversed inside the panel?
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mjgreenleyAuthor Commented:
P.S. It's an Ultra Aluminus Mid Tower case if that helps at all...
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CrystalMethodCommented:
Be very careful what wires you swap around. If you accidentally switch the wrong ones you may end up shorting out the motherboard.
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dbruntonCommented:
>> ... could they be reversed inside the panel?

Anything is possible.

I'd get a multimeter and look for the 5 volt line at the motherboard and the panel end and check they are in the right places.

I suspect with power off you should be able to find the Ground connection as well (I haven't tried this myself).
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nobusCommented:
With power off, you can use an ohmmeter to check if they are reversed or not !
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HappyCactusCommented:
nobus, no, it an unreliable method.
Power supply has a capacitive output impedence, while with ohmmeter you can only measure the resistance.
Ground on pc are usually short-circuited with earth (PE), so you can use a multimeter in continuity test mode to identify ground with the PE (the metallic chassis is connected directly with PE). But you must use it correctly, since also +5V will make a continuity test with ground, but only for the very small time while capacitors charges.
+5V can be confused with D+ and D- signals on USB, because of the pullup resistors.
The best way is to found the manuals. Any other method can damage the motherboard or hangup the system, so be aware.
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nobusCommented:
i'm not talking about anything connected to powersupply - only the wires -
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HappyCactusCommented:
ok nobus, now it's clearer. ;-)
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mjgreenleyAuthor Commented:
Sorry it's been a while. I just ran a volt meter on the front USB port and found that the volts are jumping all over the place. The back ports that do work properly are putting out a constant +5 volts. The front ports are continuously jumping from +12 to 8 to 5 to 11, etc.

Any ideas?
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nobusCommented:
do NOT use those - best disconnect them
if you need more usb ports, use a powered usb hub
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CrystalMethodCommented:
I agree with nobus. If the voltages are fluctuating that much, I wouldn't risk using them. You may end up damaging any device you connect to them.
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nobusCommented:
and note, that these come from the motherboard, so you have a problem board...
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mjgreenleyAuthor Commented:
Thanks for all of the advice. I decided to just remove the front USB ports all together and put a cover plate in. Problem solved! Well, until the rest of the motherboard decides to go south. Thanks again for all the help! Learned a lot on this one.
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nobusCommented:
tx for the feedback !
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