Hi, I have a ThinkPad E15 G4 I am working on for fun, the PD chip is not talking to the charger, it's stuck at 5v, I have replaced the PD chip three times now (new chips) and always the same result, I have checked for shorts, correct voltages on the PD IC etc - 5v 3v, and the 1.6v on the cc lines, even replaced the USB C port protector IC and the charging port,
The PD IC has a EEPROM connected directly, it's the one in the image attached, I assume the PD chip will not start without some initial commands stored in the EEPROM, the PD IC never shows in device manager, i backed up the...
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