Currently Being ModeratedNov 11, 2012 5:58 PM (in response to baochau199)
I bought a MD313 (2011 MacBook pro 13" i5) MacBook pro this summer. But after connecting my [USB] fan, the port only works with the fan. When I plug one USB, no signal connection. For 1 external hard drive, there is only noise in the motor drive and the light flashes, by contrast on the mac, nothing is displayed, as if I have nothing connected.
I tried to alt Cmd PR but nothing has changed
Could you advise me how to solve this problem please?
Thank you in advance for your answers.Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers