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Revive and restore.

NANDs replaced and same issue. Do you think by any chance it could be the U1200 - PCH?

I have tried with a second known good battery and another trackpad and presents same behaviour.

T2 and it's ROM replaced. Exactly same behaviour. I also tried to flash another firmware into the ROM chip and with a firmware from another board it goes to DFU and when I try to Revive it. the LDOs cycle once and then Revive fail. I try to change the firmware with the original board SN and...

Could it be an issue with the T2 ROM?

Data is not important on this device. Shop is dead at the moment just a few jobs. I will try that and post back. Thanks for you help.

Is it possible to replace the T2 on this?

Good battery. Tried revive and still same.

In DFU mode before staring Revive option all the power lines mentioned above are stable. As soon as I press Revive or Restore it starts to cycle again.

U7800 replaced an same issue. Revive gets stuck on Installing system. Do you think the T2 ic itself is faulty or it still could be software?

I forgot to mention at the beginning. I've checked all the coils in diode mode and all seems fine.

LDO0: 0.8V Cycling LDO1: 3.0V Cycling LDO2: 1.2V Cycling LDO3: 1.8V ~ 1.78V LDO_RTC: 1.5V Stable VOUT_RTC: 3.3V ~ 2.69V LDO_CORE: 1.5V

Hi. Got this Mac to repair which has no signs of liquid. No previous history. Battery is dead, but I tested with a good working battery and still same. PPBUS_G3 - 12.7V PP3V3_G3H_RTC - 3.38V PP1V8_SLPS2R - 1.8V Cycling. T2 is glowing from one side and cycling. SLPS2 and Awake is all cycling...

U3200 replaced and fixed the problem Battery is now charging and working fine. Thanks for your help.

I replaced both and it now has C7020 - 3.5ohms C7023 - 3.1ohms It hasn't change the charging issue.

My bad, I was checking the resistance to ground. Over then is 4.5ohms on both.

Same voltages on the LDOs on all CD3215 chips, when no voltage on R7020. resistance (ohm scale) over C7020 - 50Kohms C7023 - 50Kohms

Same behaviour on all ports. Both sides. R7020 just get voltage without battery and charger stuck on 5V.

After disconnecting the battery and connecting it for the first time. The charger stays on 5v. P_IN - 5.15V AUX_DET - 1.28V SMC_RST_IN - 0V VDDA/P - 5.11V A/BMON - 0V Leaving the battery in and unplug and plug the charger then it goes to 20 and the voltages are: P_IN - 0V AUX_DET - 0V...

On battery. P_IN - 0V AUX_DET - 0V SMC_RST_IN - 0V VDDA/P - 5.11V A/BMON - 0V