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I need to keep the data DFu will wipe it?

I have a 820-01949 that had spillage around cd3217 area U3100 had 5v. Replaced U3100 now getting 20v .065, PPbus_G3h is 12.6v . Any ideas where to look next?

HI I swapped over both Q6000/50 and fan stopped spinning fast . Must have been a bad connection on Q6050. Many thanks for your help.

I disconnected the internal lcd and hooked it up to external monitor but fan still runs fast.

HI thanks for the reply. I found a resistor missing R6001 so replaced it but fan still running full. I also noticed that the webcam turns on but black screen. Would this cause the fan to run high?.

No visible sign of spillage. I ran hw monitor and only airport proximity sensor reading high. Diagnostics only says problem with fan. I tried 2 different chassis and both the same. Any ideas welcome.

Is there anything else I could look at regarding signals voltages ect ?

I mean the dumps you get with the t203 are modified are they not?

Yes that is correct U4770. I was going to look for clean dump for this board to try but can only find the ones that come with the t203 programmer but Im not sure if these are clean or modified dumps.

Hi thanks for the info but still the same. It just says "The system cannot be restored on this device" and also "Gave up waiting for the device to transition from DFU state to Dfu state". I have tried several different macs, Os and cables. I have a t2 rom programmer is there any use in...

What is the procedure to do this ? Do I inject voltage?

Is there a special way to do that as I cannot get the host to see the mac with charger and battery disconnected?.

Do you mean with battery disconnected? if so then yes I have tried that a few times, same error.

Yes internet is stable. I have tried recover and also revive but errors out on both. Also it shows the recovery screen as in pic when mac is plugged in without pressing any buttons but if you hold power for a few mins the hold all 4 buttons it says DFu not recovery but still the same outcome...

U7000 R7021 and R7022 were both high 87k and small discoloration on U7000 so changed both resistors and now getting 20v 0.27v, PPbus_G3h is now 11.2v . I can now get it into dfu mode but it keeps erroring out on host machine. The host is running Big Sur, not sure what the faulty one was running.

No sign of spillage on the board that I can see. It draws 5v .31ma . PPBUS_g3h is 1v diode reading .385. I have tried dfu mode but host Mac can not see it. I tried removing U4770 and reprogramming it but still same. I cannot find any shorts on the board.

Hi yes I have PLT_RST_L all termination resistors/tracks look ok. No other obvious spillage. Any other signals to look for that would explain the 500ma 20v and no display?.

Some small sign of spillage on the board .After changing u7000 board then began to power up. Currently draws .500ma 20v. no display. Cpu gets warm.

There was initially 1v on ppbus_g3h swapped out u7000 and getting s0 voltages except no voltage to l7410/20/30. I have PPVCC_S0_CPU 1.07v PPVCCSA_S0_CPU 1.94v PPVCCGT_S0_CPU 0v ALL_SYS_PWRGD PM_PCH_PWROK PM_PCH_SYS_PWROK PLT_RST_L all 3.3v. Tried god bios, still same What else to check ?

Hi no short there and I changed out U8020 but still same PM_SLP_SUS_L .800mv @ R8190 (Diode .494) and PP3V3_SUS 3.3v. Edited : I noticed U8020 didn't look great so swapped again and now not getting pp3v3_sus as pp3.3sus_en is 800mv now so it must have been shorting the pp3v3_s5 to the pp3v3_sus