anyone ever brought back a USB port?

[stonewall777]

anyone ever brought back a USB port?

I keep getting an alert message saying that a USB port was
drawing too much power, and it has been disabled.

I decided to remove the logic board and clean it. So I did,
I tried to wipe it down with alcohol and Q tips. And then I
used a can of air to further blow out the dust and dry the
alcohol.

After plugging everything back in, it was completely dead. I
rechecked everything and it turns out the keyboard cable
wasn’t in correctly. So after sliding it in and latching it, I tried
again. And nothing. So I was sitting there dumbstruck and
after what seemed like forever, I heard the fan come on hard for
about a second, then off. And then the bong and it started
booting up. Yay!

The memory seemed to be working fine. But I kept getting
freezes forcing me to power off and reboot. Along with the
USB port shutdown. I decided to check the iStat widget, and the
fan was zero and the cpu was 70 degrees. So I think it was
overheating and freezing the cursor. I unplugged the fan a
couple of times and it was the same. I let it cool off and then
tried an SMU reset. And this fixed the fan, which seems to have
fixed the screen freezes.

Now back to the USBs. I decided that I could live without one
of the USBs. So I decided to try the unix command to shut off
the error message. From the terminal, I tried this:

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.UserNotification

and it didn’t work. My terminal rejected this command string.
I was just entering this at my user prompt in the terminal. I’m
not too familiar with unix, so maybe I was at the wrong prompt.
Or something…

So, I may troubleshoot the USBs if anyone has anything to try.


Thanks.

 

[old-wiz]

I've seen the message, but the solution was to unplug the errant device and reboot. It worked fine after that.