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820-00928 PP1V1_UPC_XA_LDO_BMC 0V PPBUS 0V

No-Clean

No-Clean

Member
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

2informaticos

Administrator
Staff member
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.
www.masterliuonline.com

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 www.masterliuonline.com
 
No-Clean

No-Clean

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