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There is a different behaviour today, but I haven't done anything yet. It has now a power cycling on PLT_RST_L. It stays cycling for a few minutes and on the other mac where I have the Apple Configurator it keeps showing lock sign and cycling.

When left it in shell, it had the fan connected. CPU core voltage when it's hot is 1.8V and PLT_RST_L also 1.8V

I couldn't fix these as customer collected as not repaired. So, no updates about how to fix it.

I left it plugged to DC and battery for about 10 minutes. (I was with a customer and I forgot to disconnect) Now on DC I'm getting 20V and 2.02A. Heat Sink and surrounding is burning hot.

Sorry, I mixed the context above. 1.9A is with battery connected. PLT_RST_L - 0V - Without battery always 0V - With battery connected it happened once after a few minutes 1.8V cycles for less than a sec and on DC was 0.9 A. PP1V8_PRIM_PCH - 1.02V

Fan spins for a second while it's cycling for a minute. After it stays on 20V, 1.9A. But sometimes if connect battery and power it will not cycle and goes straight to 20v, 39W, 1.945A All this coils. L9060 - PVCCSSD0_PHASE - 2.53V L7670 - PP5V_G3S - 5.10V L7690 - P3V3G3H - 3.29V L7030 -...

The customer stated that it suddenly stops to turn on. Trackpad clicks, but no display. No external video. All voltages were taken w/o the audio board connected. Caps lock has no reaction. USB activity (Light on the USB Stick turns on, but keeps cycling same as the board is doing)

PPBUS_G3H = 12.66V NOT CYCLING PP3v3_G3H = 3.28V NOT CYCLING PP1V8_SLPS2R = 1.8V CYCLING FOR A MINUTE PP1V8_AWAKE = 1.8V CYCLING FOR A MINUTE PP1V1_SLPS2R = 1.1V CYCLING FOR A MINUTE PP0V8_SLPS2R = 0.79V CYCLING FOR A MINUTE PP3V3_AWAKE = 3.29V CYCLING FOR A MINUTE PP1V2_AWAKE = 1.2V CYCLING FOR...

Hi. Please I really need help with this. Can't figure out the issue. Here I have an 820-01958 that came with no power. After my first diagnostics found U7800 getting very hot. The voltage on the charger was 20v, varying from 2W to 3W and 0.200A. After replacing U7800 the voltages are. With...

No USB activity.

After replacing U1950 the board started to get 1.77V on U7310/20/30. But the fan is still high speed and has no display. I've tested with another battery and same results. Something I've noticed is that even with the fan on high speed the heatsink is burning hot, but this happens with the...

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 =...