820-3787-A no USB from both ports

Davis

Member
5V present on the ports? Any other USB devices working like BT and trackpad in boot menu?

No, 5v gives 0. something at first touch and goes down to 0. - TP and BT worked just fine but no usb on both ports..strange.
 
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dukefawks

Administrator
Check if USB_EXTB_OC_L and USB_EXTA_OC_L are high. Disconnect right IO board and see if USB on the board has power.
 

dukefawks

Administrator
That means that J4600 is drawing too much current. Either a short on the 5V line from U4600 to J4600 or dead U4600.
 

Davis

Member
That means that J4600 is drawing too much current. Either a short on the 5V line from U4600 to J4600 or dead U4600.
Ok so I got today a message USB DEVICES DISABLED unplug the device using too much power etc.. guess J4600 drawing too much current, what is the options here? considering ultrasonic to begin with but what if it doesn't help? only replacment?
 
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