When I try to connect a USB cable a message appears on the screen
When I try to connect a USB cable a message appears on the screen saying that one or more USB devices are consuming to much energy and due to this the USB port were deactivated.
What should I do to solve this problem?
Do not forget is only a merely USB cable from a texas calculator, I have experienced to with an USB extension, and the same problem appears, I have tried to connect directly a USB memory stick and the IMAC do not recognise is presence, or appears thesame mesage as with the cable.
Updated information:
I have perfomed as rkaufmann87 instruct me but without any success.
Then I made some more tests:
I have tried to connect three diferent types (Ipad usb cable; TI-Nspire CX CAS usb cable and an ordinary extension usb cable) of usb connectors cables and all of them with the same behaviour.
Viewing the IMAC from backside and looking to the usb ports from the left to the rigth the behaviour of the USB ports are diferent.
the two first more to the left when we try to connect a USB cable, a message appears on the screen, sayng that USB devices are consuming to much energy and due to this the USB port were deactivated (This is more or less the translation from Portuguese language).
The ones more to the rigth nothing happens, simply are dead, no message and no charge the IPAD, no connect the USB stick.
I really need yuor support, this IMAC is from November 2012.
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