Some USB ports are designed to supply more power than others.  It could be
the header is functional, but can't supply as much current as the card
reader would like.
On Dec 21, 2011 9:37 AM, "Claude Jones" <cjonesli...@tehogeeservices.com>
wrote:

> On 12/20/2011 5:14 PM, Claude Jones wrote:
>
>> No one responded on this, but, in case someone else has similar
>> problems. The issue was caused by a card reader with three or four
>> different slots in it for various sized cards, plus a USB port.
>> Unplugging if from the machine has cured the problem.
>>
>>  Plugged the supposedly offending card reader into a different USB header
> on the motherboard, the problem is still resolved. Apparently, the USB
> header on the motherboard was the culprit, not the card reader.
>
>
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> Claude Jones Brunswick, MD, USA
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