Dell PC not recognizing multimeadia reader. Win7

Running Windows 7 Pro on Dell Optiplex 3020 minitower.  Intel pentium motherboard.  I'm trying to plug in a multimedia card reader into the internal USB port.  See pictures of internal port and end of multimedia reader. Seems pretty simple. After I plug it in and turn on computer the new disk drive devices should show on my computer and device manager, but they don't.  Tried putting in an SD card on the chance the drives won't show unless they have a card plugged in.  Still nothing.  I don't think those internal usb ports need to be enabled or anything.  Tried two different card readers taken from other computers.  Neither works.
Thanks,
Alan multmedia-reader1.jpgmultmedia-reader2.jpg
Alan SilvermanOwnerAsked:
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Alan SilvermanOwnerAuthor Commented:
Update.  I just put the card reader into the internal usb port of a Dell Optiplex 9010 I have and it recognized the reader.  I wonder if it's a problem with the port on the 3020..
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dbruntonCommented:
It is possible that the USB pinout on the 3020 motherboard is not the same as the 9010 motherboard but the 9010 pinout is compatible with your reader plug.

If you have access to the 3020 manual it may show you the pinout connections.

The wires on your reader should be Red, White, Green, Black where Red is power +5V and Black is Ground.

Read the following articles carefully

http://en.community.dell.com/support-forums/desktop/f/3514/t/19411990 (the links out from the article won't work but the information is still explanatory)

http://www.directron.com/installusb.html

Using a mult-meter and the information in the two links determine if the pinout on the 3020 is compatible with your reader wires.  Find the 5v pin and the ground pin first.  Then you might be able to determine which is D- also.

If your reader wires are incompatible with the pinout it may be possible to reposition them in their clip.  Post back for information on how to do this.
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☠ MASQ ☠Commented:
Are all the MT's other USB ports active? There is a BIOS option to enable/disable USB hubs individually on the 3020 - just a thought ...
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Alan SilvermanOwnerAuthor Commented:
Good ideas.  I brought the computer to a client so I won't be able to try them immediately.
Thanks,
Alan
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