macbook A1708 820-00840-A

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  • mon2
    Badcaps Legend
    • Dec 2019
    • 14659
    • Canada
    #21
    This rail should be active after the TBT rom has booted.

    Check the other LDO rails on the CD3215:

    PP3V3_UPC_XB_LDO
    PP1V8_UPC_XB_LDOA
    PP1V8_UPC_XB_LDOD

      Comment

      • PITERPENY
        Badcaps Veteran
        • Jul 2023
        • 461
        • Ukraine
        #22
        PP3V3_UPC_XB_LDO=3.3V
        PP1V8_UPC_XB_LDOA=1.8V
        PP1V8_UPC_XB_LDOD=1.8V
        I don’t understand why it doesn’t switch to 20V

          Comment

          • mon2
            Badcaps Legend
            • Dec 2019
            • 14659
            • Canada
            #23
            The cd3215s must be all operational to switch. Check the voltage on each pin of the TBT rom. The TBT rom firmware may be corrupted. There are dumps of the firmware available on this website.

              Comment

              • PITERPENY
                Badcaps Veteran
                • Jul 2023
                • 461
                • Ukraine
                #24
                Thunderbolt is U2890?
                Last edited by PITERPENY; 05-13-2024, 05:45 PM.

                  Comment

                  • PITERPENY
                    Badcaps Veteran
                    • Jul 2023
                    • 461
                    • Ukraine
                    #25
                    Can I get it from another board?

                      Comment

                      • PITERPENY
                        Badcaps Veteran
                        • Jul 2023
                        • 461
                        • Ukraine
                        #26
                        it worked! Mac works! thank you for your help, this is the first time I've encountered such a problem as a non-working thunderbolt!

                          Comment

                          • mon2
                            Badcaps Legend
                            • Dec 2019
                            • 14659
                            • Canada
                            #27
                            Ghetto is about right. Glad to hear of some success for today. Time for another episode of Top Boy (Netflix). Soon I will be able to speak Brit / Jamaican slang...

                              Comment

                              • PITERPENY
                                Badcaps Veteran
                                • Jul 2023
                                • 461
                                • Ukraine
                                #28
                                Originally posted by mon2
                                Ghetto is about right. Glad to hear of some success for today. Time for another episode of Top Boy (Netflix). Soon I will be able to speak Brit / Jamaican slang...
                                This is wonderful ! good luck with this))

                                  Comment

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                                  • EpicFix
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                                    by EpicFix
                                    Hey guys, I need a little help here. I have a MacBook Pro A1708 820-00840 stuck @ 5V. Started off affecting just one port but now it's affecting both. Both CD3215 ics were replaced but the issue remains. One port does a loop and the other stays at a constant 5V. Both CD3215 have 3V incoming. I checked for PP3V3_G3H @ R3000, C3100 and C3108, R3001, C3200 and C3208. The weird thing is though that the ammeter shows the current draw (5V @ 0.5A) coming out from the port as opposed to it going in. Any ideas on helping me fix this?
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                                    I have Macbook A1708 820-00840
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