820-00840 Data does not work on USB-C

iClub

Member
Good afternoon, this mac was not working HDMI, I performed U2800 and it worked again. Now the customer returns with the defect of not reading data from SSD/HD 2.0/3.0.
I performed the replacement of the two cd3215 but did not solve it.
 

2informaticos

Administrator
Staff member
Usually works without it; at least USB 2.0.
Remove the chip and test with various device, like mouse, pendrive...
 

2informaticos

Administrator
Staff member
Check diode mode to ground on all USB3 data lines.
Compare with good board, if possible.
There should be some series capacitors to check also.
 
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