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Board had spillage around q5480 and U6903. U6903 was short so replaced 5v 110ma on all 4 ports ppbus 12.3v no obvious shorts. I can get it info dfu but it fails with 0xFAE (4014) with or without battery present. What should I check next?

Thanks for your time, much appreciated.

Yes, but PP1V2_S2 is cycling.

No it wont go into dfu mode Apologies for the delay in replying

Going back to PPVDD_DISP_AWAKESW I removed coils L7840, l78a0 (4 coils) at U770 and seems to be on U0600 side so I guess cpu is dead yes?.

Yes both stable, PPBUS_AON 12.4v

Thanks for the info , unfortunately PP1V2_S2 is cycling also.

Any link to instructions?

Just going through the rails now PP0V81_S1_SRAM is pulsing PP0V95_S2SW_VDD2L is pulsing PP1V8_S2SW is pulsing PP0V575_S1_VDDQ0 is pulsing PP0V575_S1_VDDQ1 is pulsing PP0V855_S2SW_VDDCIO is pulsing

HI only 5v 0m 12.5v ppbus . spillage around ut360 replaced 3 resistors PPBUS_AON 12.4v PP3V8_AON 3.8v PPVDD_DISP_AWAKESW 0v 0.056v diode mode this should be 0.199 ?. Not sure what to check next any help appreciated

Partially damaged cpu no doubt.

EDP_AUXCH_N is reading short.

No it stays low all previous measurements were with screen attached.

Hi I checked J8500 diode mode and all seem ok no shorts. PP5V_S0SW_LCD = 5v PPVOUT_S0_LCDBKLT = 0v PPVIN_S0SW_LCDBKLT_R = 12.5v LCDBKLT_EN_L = 12.48v PP5V_S0_BKLT_A = 5v PP5V_S0_BKLT_D =5v EDP_BKLT_EN = 0v I have also replaced U8400 Any ideas?

I changed both the nands and I dfu no problem and now it boots and chimes but has no backlight so investigating that now. I have external video only.

No sign of spillage/damage. Customer said they had just finished installing os and it would not power up again. PPbus is 12.6v I have tried in dfu mode and forced dfu mode but still get amrestore error. SSD voltages present PP1V8_IO_SSD0, PP0V9_SSD0 , PP2V5_NAND_SSD0 on both nand chips.

Hi yes I meant to mention no external video apologies. All diode reading are good. When I got it, I fixed the initial issue which was u7800 then upon testing found where I am at now.

Hi Macbook came in No spillage with short on PP3V3_S5 after removing and replacing u7800 short is gone. The board draws up to 680ma then drops to 340ma. Chipmunk usb activity led shows activity on usb. but black screen. (also tried known good screen) L8030 1.2V L7960 .95V L7900 1V L8060 1V...

Has anyone got any hd images of around U8600 as some of the components got bumped.

I should have a few here will try it. Thank you for your help.