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I got same Mac with exactly same issue and behaviour. It was fixed by replacing SN650801 - U7600.

Yes, I've tested many times and even checked by someone else to make sure I'm not 🤪. I've done only revive option. This issue I'm mentioning is on restore screen before install system. I will do dfu restore on Monday.

On SMC bypass mode, fan cycles twice and stop. PP3V3_S5 - 3.3V PP3V3_SUS - 3.3V PP3V3_S0 - 0.10V (Cycle to 3.3V for a sec if press power button) PP1V05_S0 - 0V (Cycle to 0.99V for a sec if press power button)

I don't know what's going on here. After DFU revive it went to activation lock screen and guess what, no more screen issues. Then I went through the activation process to activate the mac and for this I had to set up a Wi-Fi and instantly after turn on Wi-Fi screen went off. I connected to an...

L7310/20 and PLT_RESET_L pulsing too

yes

With and without R8178, the voltages are. ALL_SYS_PWRGD - 0V CPUVR_PGOOD_R - 0.05V SYS_PWROK_R - 0V PM_S0_PGOOD - 0V SMC_DELAYED_PWRGD - 0V PP3V42_G3H - 3.41V

Yes, I mean R8178. CPU core voltage not present. USB has power, but no activity.

After remove the R8179 the voltage on L7420 is 1.20V.

I was testing without trackpad. RR313 - LID_OPEN/SMC_LID_OPEN_R - 1.16V RR203 - IPD_LID_OPEN_1V8 - 1.8V I don't have another board at the moment to compare.

All 3 lines has same voltage after display goes off. LID_OPEN - 1.16V AMR_LEFT - 1.56V AMR_ RIGHT - 1.56V

Both replaced and still no fan spinning.

PP5V_SW_LCD - stable PP3V3_SW_LCD - 3.14V when display is on and 3.25V when display is off. I've replaced UP701 just to check if it would get any difference, but still same.

I've tried with another cable and same issue.

You mean the lcd is faulty? But I tested with another 2 lcd display and the same is happening.

Hi. Please help. M1 MacBook with intermittent display, but backlight stays on. The display stays on for about 1 minute and goes off. Tested with 2 other displays and same issue. External monitor works fine. PPVOUT_LCDBKLT - 43.45V after display goes off. Tested all EDP and LDDP lines in diode...

After resolder R8111 and remove R8168 voltage on L7430 cycle 2 time for less than a sec and stays on 0V

L7520 5.43V steady when R8111 removed L7430 0.269 diode mode

Hi, here I have this Mac with Green and Orange light, but no power. Has no signs of liquid. Q7560 replaced as it was blown. After a few checks, I found that PM_SLP_S4_L is missing. I replaced clock chip U1900 and Y1915 just to make sure it was OK. Still no power. I removed R8111 and...

OK. This will be a donor board for now. Thanks for your help.