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820-01521 is stuck on boot, no shorts anyway, stuck on 5v 70ma. no heat signature anywhere including T2 except for the cd3215 that its connected to. PPBUS_G3H 12.2V LDO on the PMU for SLP/awake all present. including 3v3. injected 1.8v to force_DFU but does not seem to work. out of ideas now

Hello, I have a 820-02020 with history of water damage. Motherboard was not affected in anyway, backlight film needs replacing but customer did not want to pay. 2 months down the road, macbook is back with not turning on fault. upon inspection, L7800 is burned and U7700 is shorted. Replaced...

i have a 820-3478 which Fan spins but don't chime and only black screen first 2 LED lights up, CPU Vcore 1.7V GPU Vcore 0.8V PLT_RST_L 3.3V no shorts detected is this GPU issue? resistance on gpu core is 20ohms same goes to CPU as well.

Hello, got a 00928 come in as water damaged but upon checking, liquid never hit the board. most on the LCD connector. nothing seems burned. diode reading on backlight output and MUX data pins are good. right now macbook does not boot fully, no backlight or image either, using an external...

i have a 820-2879 that runs extremely slow, i have removed everything except LCD and still the same takes 15 mins to show folder logo without HDD, i can't get into ASA cause either its stuck or takes forever. no liquid damage on board. and i dun think there is ME to clear for this model. any...

Hi, this macbook came in as dead. i unplugged battery and it boots with charger, but i'm getting critical error, unplugged all everything except for the LCD and still getting same error but able to boot into safe mode. upon motherboard inspection, saw caps resisters around the T1 area is...

A1502 820-4924 does not boot into anything except ? folder. No diagnostic, no recovery, no external, not even startup manager. Customer said he erase the macbook from icloud and now we can't reinstall macOS anymore. Just so coincidence this is a hardware fault? tested on another chasis to rule...

do you know where is the sensor for cpu core 8 on an a1990 820-01814? or this is normal? but i do get an error saying there is an issue with the SMC during diagnostics...

so this 01949 is definitely having issues with 1 of the sensors, i have trouble finding out which cause i do not have another chassis to test with. apple diagnostic took 30 mins to complete and shows SMC error(duhh) but trackpad, kb, fans, webcam all are working. board is pristine, no...

Hello, i have a 820-00045 with initial had charging issues, found short c7131, replaced and device turns on now. Charging still have some issues where only 1 side is able to charge. i replaced u4520 and now it works both side (actually i tested with chip removed and that works so no idea how...

we refurbish this 820-00840 before selling it out to customer, about 2 month later customer complains that it randomly shuts down. 1 week about ~3 times. we took back the laptop and now it does not boot at all. Found out that when battery is not plugged in, it boots fine with just charger...

820-2915 came in for GPU Bypass as screen was showing artifact. Successfully Flash Gmux, boot up fine and returned to customer. next day customer says laptop does not start, brought back and checked Fan spins but does not post. cpuvcore start with 1.15v and goes to 0.75V and jumps between...

macbook came in dead, after checking ppbus_g3h was only 1.5V. Replaced ISL chip and laptop successfully boot up(without battery) so installed into chassis screwed in the battery and tested boot up fine with charging cable. 2nd restart macbook does not boot up anymore, measured ppbus_g3h back to...

Macbook air randomly shutsdown. can't find the trigger for it yet. found Previous shutdown cause : 6 in logs. no info for this code. Where should i start? CPU mosfet? it shuts down when i try mem64 also

i'm getting 20V on usb and board is pulsing voltage everywhere No all_sys_Pwrgd. but found pp1v2_s3, followed by missing PM_MEMVTT_EN <- is this the en signal for pp1v2_s3? and would this be the cause for pulsing? also PP3V3_S4SW_SNS missing also due to SMC_SENSOR_PWR_EN missing. which should...

Board does not boot and LED 1 only blink. pp12V_G3h - 12V pp12V_s5 = 12v pp3v42 - 3.41 pp5v_s5 = 4.9 pp3v3_s5 = 0 PM_EN_P3V3_S5_REG = 3.8v constant. Tried replacing u7700 - same, but i replaced with ISL62383C same outcome. i removed R7776 to cut pp3v3_s5 from load, i get still get 3.3 for...

Unit came is as dead, no light on magsafe Found smc shorted, and pp3v42_g3h 8.7V replaced SMC, U7090,R7095,R7096. and now get orange light on charger. Still does not boot. RTC voltage and pch signal all good but missing pm_slp_sus_l. This needed for pm_slp_ s5_l signal? or dead CPU

Hello, i just received 2 units MBP 820-2915 and both have the same symptom. Fan spins, No chime, no USB activity, No Capslock. Vcore 0.78V. when removed RAM, it beeps. same with SMC Bypass mode. I know GPU dies alot for this modal but what are the other usual suspects?

Unit is very clean.. no water damage anywhere but does this funny boot sequence. first cycle - fan immediately spins for 5 seconds and power cut off. during this, cpucore is 1.05v 2nd cycle - without unplugging charger, i get cpucore 1.05v for 5 seconds, but no fan spin. fan start spinning...

Got a 2915 with no image no backlight no external display. my guess is the GFX is dying/dead, and if its not it will soon be anyway, so wanting to try a Gmux flash for the first time, getting this error on lattice programmer below: so my guess is that the jtag scan came up empty because it...