One of USB port is disabled (No power No connection)
One of USB port (next to "shift" button) of my macbook is disabled as warning of "drawing too much powr from computer".
I have tried to following methods to re-enable the USB port but all fail to do so.
1. PMU (remove battery and a/c cable then press power button for 5s and restart)
2. SMC (press option + "apple"key + P + R at start up for 3 times)
3. Press and hold power button for 10s at start up
4. enter safe mode (press and hold "shift" at start up.
could any one suggest other method to bring back the power of USB port?
Thanks!
Macbook 2GHz Intel Core Due 2GB DDR2 SDRAM, Mac OS X (10.6.1)