Imac 27 2010 no USB

samiam

New member
820-2733

no USB


checked
5V into U4600

no output, no enable signal




Q4600 getting 5V on pin 1



R4600 ok 9.9ohm

should I replace Q4600 or should I be looking somewhere else?
 

dukefawks

Administrator
Well, if U4600/01 pin 3 and 4 are low and 5V is coming in on pin 2 there should be output on pin 6. So looks like dead U4600/01, but I have never seen them both fail.
 
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