Chosen Solution
I accidentally put a 12v power supply into my USB Hub wich was connected to my MBP 13" (late 2011). Both USB ports are now unusable. Any chance to fix this without getting a new logic board? Best regards.
Maybe you might! It’s some work, but there are fuse links on the USB power feed lines so you might be able to save the logic board. I should point out these are SMT components so you do need to have good soldering skills and will need to use a meter to measure the voltages. I would first check out to see if the USB ports are still working (just not able to power the device). Using a new powered USB hub and a known good USB device connected to it (i.e. HD or thumb drive) can you get the port to see the drive. If you can you have a chance here, if not, sorry you burn’t the controller on the logic board. Also check your power lines using a cheater cord do they offer power? As you could have burn’t something else.
Same thing happened to my early 2011 MBP. The proto board I was testing (AMS1117 3.3V regulator on PIC microcontroller with USB function) suddenly failed and fed 12V on usb rail. Mac suddenly shut down on me. I unplugged the usb at once. However that USB port never worked after that. Even the remaining one does not provide enough power to connect up an external HDD or Pickit Programmer now. Only solution was to use a powered USB hub. This is the part I suspect which had failed due to high voltage. http://www.ti.com/lit/ds/symlink/tps2561…
