Hello,
I have an A2141 - 820-01700 MacBook Pro that does not want to turn on. Motherboard is clean, free of any corrosion. Checking all ports I found one that was showing nothing on the amp meter when the other ports showed 5v - 0.380 amps. I replaced UB300 and now we see 5v 0.380 amps on all 4 ports, but still not turning on. What is interesting though is that when connecting to another MacBook through a Type C cable, when I remove the charger and plug it back in, I see 20 volts - 0 amps on all ports. If I disconnect the connection to the other MacBook and replug the charger, it goes back to 5v - 0.380 amps. In Apple Configurator, I do not see it in DFU mode.
PPBUS_G3H = 12.3 volts from charger (doesn't matter if connected to other MacBook or not)
What should I check?
EDIT: Looks like CD3217 in this model uses i2c addresses that are burned into the chips so must be sourced from another donor. I am going to give that a try.
I have an A2141 - 820-01700 MacBook Pro that does not want to turn on. Motherboard is clean, free of any corrosion. Checking all ports I found one that was showing nothing on the amp meter when the other ports showed 5v - 0.380 amps. I replaced UB300 and now we see 5v 0.380 amps on all 4 ports, but still not turning on. What is interesting though is that when connecting to another MacBook through a Type C cable, when I remove the charger and plug it back in, I see 20 volts - 0 amps on all ports. If I disconnect the connection to the other MacBook and replug the charger, it goes back to 5v - 0.380 amps. In Apple Configurator, I do not see it in DFU mode.
PPBUS_G3H = 12.3 volts from charger (doesn't matter if connected to other MacBook or not)
What should I check?
EDIT: Looks like CD3217 in this model uses i2c addresses that are burned into the chips so must be sourced from another donor. I am going to give that a try.
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