820-2936-B No USB ports

wrbailey

New member
I have a 13" MacBook pro (Early 2011)

neither USB ports are "working".

Each will light up a mouse for a split second and then goes dark.

Both have the 5V.

J4600 which also acts like a SMC debug port has SEL 10 HI (3.4v) and of course OE is low since it is GND. This should select USB, instead of SMC...

J4610 no mux, just straight up USB and it has 5v, but not lighting mouse for more than a split second (or my USB drive that has activity light built in)

No liquid damage.

Machine boots and runs just like it should, other than USB issue. iSight camera works, and built in keyboard and trackpad work (they're on a "USB" hub)

Any ideas?

Thanks!
 

wrbailey

New member
L4610: 0L on PIN 3
0.626 on PIN 2
0.617 on PIN 4
0.623 on PIN 1

replaced L4610 and now BOTH USB work... Why would L4610 affect the other USB port???
 

dukefawks

Administrator
No, L4600 is probably intermittent too. Why are you going out of your way to not just replace 2 simple coils?
 

wrbailey

New member
Diode measured L4610 and it had the 0L and L4600 measured just fine. That's why I asked the question. Thank you for clarifying on why L4610 could affect L4600... it doesn't. Just gonna go bad sooner or later too. I'll replace it too

thank you.
 
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