3 
2 USB Ports / Accessories Disabled
Hi,
I am repairing a friends Macbook Pro Early 2011. The HDD had failed and they were desperate to retrieve photos.
I managed to do a deep scan on the HDD and recovered the photos to my NAS and I have just fitted a new Toshiba 500GB HDD.
I tried to install Mac OS High Sierra using a bootable USB device however the device was not recognised so I had to install Mac OS Lion using Internet Recovery.
Once I go Lion is running I have identified that neither of the two USB ports are recognising any of the three USB Thumb Drives I have.
I upgraded the OS to Sierra by downloading the OS from Apple and thought maybe that would do the trick but still no USB ports working.
I have reset the SMC (I believe this model has to use the non removable method) the power light is supposed to blink when doing this with the Shift / Alt / CMD and Power button held down but it did not? When I released the buttons the power light went green and then orange?
I have also tried reseting NVRAM by using the CMD Alt P / R and power on chime twice and then let it boot up. Still no USB ports?
I have just also tested a powered USB hub and the Thumb Drives connected still do not show up. This hub works on my own (newer) Macbook Pro.?
Anything else I can try?
Update (04/03/2021)
Still have the overcurrent warning and no USB ports working?
crwdns2934109:0crwdne2934109:0
970 
None of the USB devices I am using are USB3.0 they are all old.
Anyway, with nothing plugged in, I followed the guide on this page to boot into single user mode and after it finally got to the command prompt it started displaying the following overcurrent message:
AppleUSBHostPort::InterruptOccurred: overcurrent detected with port status 0x4000, localSimulatedInterrupts = 0x0So that tells me there is a problem associated with the USB ports?
I cleaned them with rubbing alcohol and after booting up I was met with the following message on the screen:
USB Accessories disabled - Unplug the accessory using too much power to reenable USB devices.
crwdns2934271:0crwdnd2934271:0 JonnyAlpha crwdne2934271:0
Yes, you have a USB power issue either the contacts in one of the ports is damaged or the logic boards power circuit needs repairs.
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0