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Yes, the CPU is not getting any voltage and surely it will not boot. I just replaced it as a guess that MOSFETs was faulty. New MOSFETs are DC15AD - DMF3030. U1950 Pin 1 - 2.25V ~ 2.50V Pin 3 - 0V Pin 7 - 0V Pin 8 - 3.42V Just a doubt, does this board require a battery connected to turn on?

Hi everyone. I need help with this Mac, please. No signs of liquid, no short on the board. It turns on, but will not display. The fan goes to high speed. L3095 - 0V L7520 PP5V_S4 - 5.05 L7130 PPVBAT_G3H_CHGR_REG - 12.59V L7560 P3V3S5_LL - 3.32V L7630 PP1V05_S0_REG_R - 1.05V L7430...

Thanks, so this board is now a donor I guess. Shame.

3 SSD Nands are getting warm/hot, and there was scorch marks on U9080. PP2V5_NAND_SSD0 is 1.5Ohms, removing U9080 and U9000 has made no difference to this resistance. After injecting 1V without the two SSD controllers present nothing gets hot So would it be accurate to say at this stage one...

Hi, I have an A1990 board 820-01041-A, no corrosion or liquid. The NANDs on the left (immediately are getting warm after 10 seconds or so, then get hot - no power. The trackpad was clicking, after trying DFU revive it doesn't click any longer. Board is taking 20V and bouncing between 0.1A and...

Both CD3215 replaced Works fine Thanks

PP1V8_UPC_XA_LDOD - 1.8V PP1V1_UPC_XA_LDO_BMC - 0V PP3V3_UPC_XA_LDO - 3.23V PP1V8_UPC_XA_LDOA - 1.8V The other mac does not recognize the faulty mac when in DFU mode.

Yes, stays on and working. But doesn't charge the battery. The amp meter shows 5v, 0.2667A just when there is no battery. After connecting, the battery mac turns on and works fine, but the amp meter stays off.

Hi. I need help, please. The customer stated that it suddenly stop to0 turn on. PPBUS_G3H = 12.63V PP3v3_G3H = 3.4V PP1V8_SLPS2R = 1.8V PP1V8_AWAKE = 1.8V PP1V1_SLPS2R = 1.1V PP0V8_SLPS2R = 0.79V PP3V3_AWAKE = 3.4V PP1V2_AWAKE = 1.19V PMU_PVDDMAIN_EN = 0V P3V3MAIN_PGOOD = 0V PP3V3_G3H_RTC =...

Quick update. After replacing U9850 I manage to put it on DFU mode and all voltages stayed on. Done the revive and the Mac is alive. Thanks to everyone that help me out here.

Ok thanks

Yes, that's the one I'm using. 96W. On DFU mode it reacts the same. It goes to DFU mode and the same happens after about 30 secs.

Original Apple charger. I have 2 more original charger. I will try with those 2 tomorrow.

It is restarting with and without a battery. The battery is charging fine and it same thing happens only on the battery. Only the LB alone same thing. CPU core goes to 1.3V then drop to 0.69V and after a few secs restarts. USB activity on a USB stick with LED light. The USB stick power on starts...

Diode mode LCD disconnected. EDP_INT_AUX_N - 460 EDP_INT_AUX_P - 461 EDP_INT_ML_N<0> - 409 EDP_INT_ML_P<0> - 406 EDP_INT_ML_N<1> - 408 EDP_INT_ML_P<1> - 408 EDP_INT_ML_N<2> - 412 EDP_INT_ML_P<2> - 408 EDP_INT_ML_N<3> - 408 EDP_INT_ML_P<3> - 407 ----------------------------------------------...

The battery is good as I've tested the same battery on another mac I had from another customer and it worked fine. I will check the U9850. The liquid wasn't near the screen connector on the logic board, but on the little board on the screen.

on L7211 starts at 1.9v then drop to 0.69v and after 25 secs 0v. USB ports are normal Is it normal for the CPU to boil hot just after plugging the charger?

Hi, everyone Please I need help with these Mac. Liquid damage on-screen board and logic board had some oxidation around C1171. After cleaning the corrosion and oxidation the board turns on, but no display. Tested with another display and still same. If I leave the battery connected it turns on...

I bought it from Mouser.co.uk. Yes, the heat sink and logic board were removed. I will try to remove the internal SSD and test with external USB macOS.

My diagnosis for this was the 3 power regulation IC for the CPU. Ordered 3 "FDMF 3030" ICs and replaced them, but unfortunately the same issue. Please does anyone has any idea what's the next step to check is? Thanks