820-00928 PP1V1_UPC_XA_LDO_BMC 0V PPBUS 0V

[No-Clean]

Board had a little bit of corrosion 3 ports restart at 5V every few seconds except U3100 that one stays at 5V I replaced U3100 3 times and same thing, also only on that port PP1V1_UPC_XA_LDO_BMC is 0V, PPBUS is 0V, I also replaced U7000 but same thing.

 

[2informaticos]

You have a problem on that port with missing LDO_BMC.
Compare diode mode readings around U3100 with another port.

S-UEM2 can help you with some checkings there.

S-UEM2 Mac USB-C and EDP meter

S-UEM2 is a tester for USB-C and EDP connector of MacBook logic board

www.masterliuonline.com

 

[No-Clean]

Diode mode on port is on par with working board, I also replaced from same board U2890 and U3500 same thing