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Hello, this 00045 was water damaged. No obvious signs of liquid. I noticed that U4600 had a small hole in it. I replaced it, fixed a short on 3V3_AON by replacing U4470 and U4650 and changed U4700, U4780 and U7100 but no change so far. My USBC-meter turns on for a second but as soon as it...

Hello, I'm working on a 820-01814 that was water damaged. I got it with U3100/U3200 area fluxed and both ports not turning on USB-C-meter at all. The other two ports were stuck at 5V/400mA. U3200 was getting hot. This board raise a few questions for me regarding CD5215s. My schematic states that...

Hello, working on this 17" 820-2610 came to me not starting with C7771 issue (.3V). I replaced C7771, but still the same. I also replaced U7750, but still .3V. Does that point to the MCP itself, or is there anything else that could cause this and that I am missing here?

Hello, i am trying to complete an old device for a person i know. This is the 2nd possible board i have in storage and could use for this old device but it has a strange issue. The device has 2 drives. 1 SSD and instead of an ODD a 2nd HDD. macOS is on both. If i install macOS (Snow Leopard) on...

Hello, i am working on this old device for a person i know. The board works perfectly find except it mostly wont wake from sleep. I cant figure out what causes this but really rarely it did wake up until it got rebooted (observed this only 2 times). Lid did not need to be closed for this to...

This 820-2849 Turns on for 5 seconds, off for 5 seconds and repeats this over and over again. If its on every Rail except PPVCORE_GPU is present. PPVCORE_GPU is 0.05V. U8900 seems to have all signals it needs and i get ~6 Ohms to GND on it. Is that to low? Is there anything i forgot to check or...

Hello, this 820-2936 had waterdamage. Missing trace near Q5300, waterdamage by Q3880, SMC (reflowed), Q5030, the usually... I fixed everything visible but its not creating PM_SLP_S4_L. Just to be sure id like to get help with it so i dont miss/forget anything.

This 820-3115 came to me dead. I fixed a short on 3V42 and now it has quater fan spin. PP3V3_S5 is stable, PP5V_S3 is pulsing every 5 seconds cause PM_SPL_S4_l is also pulsing. Not really sure where to go from here. Any known suspects like U1950 on 00165? I did replace U7200 and clock ic so far...

Hello, this 3115 looks perfectly fine. Probably never disassembeled... It spins the fan if plugged in but thats it. No cime, No USB, no beep without ram. Its missing PPVCORE_SO_CPU, PP0V75_SO_DDRVTT and PPVCORE_SO_AXG. I followed that path and came to PLT_RESET_L missing. CPU_IMVP seems fine and...

Hello, i am working on an 820-02020. It was waterdamaged and stuck st 5V. I fixed that (Short on V3_S2 near UL000 ). I also fixed other minor waterdamage on UD560, UD550, UC300, Q5240, UP700. After that it turned back on and i could download (via RJ45) and reinstall macOS. But it always crashes...

This 820-3437 turns on but also off again after a few seconds. I tested the board outside the case and same thing. after it turned itshelf off i can turn it back on without any problems. Sometines it turns off during RTC-reset and sometimes it stays on for a few seconds. But it never made it to...

Hello, i had quiet a few of the 2012 27" Retina iMacs here that work fine (if the customes shows up) but randomly turn off. I could verify that issue and testet these machines alot. I am pretty sure that its a probem with the MLB as i could rule out virtually everything else at this point. I had...

Hello, this 820-494 is dead after the customer swapped a faulty trackpad cable. He did not removed the battery and as he want to plug it in he saw a spark on J4802 (the corrosponding connector at the trackpad - not at the board). So i guess he shorted PPVIN_S4_Tpad to GND. Now its dead and...

Hello, this 820-2936 was waterdamaged. I fixed all the corrosion and now it works again. The only problem is that its working slow and fan is spinning full speed. I run ASD and got 1 error: TC0C "unable to read sensor". I Already changed U5510, C5511, C5512 and verifyed R5510, R5511 and R5512. I...

Hello, this 820-3209 was waterdamaged and dead. I fixed it (including a new SMC) and now everything except keyboard backlight works fine. If i dont cover the light sensor i cant adjust the kayboard backlight brightness. If i cover it i can lower and raise the keyboard brightness. So i guess SMC...

Hello, this 820-3032 is dead. I noticet that the cpu is getting slightly warm after some time (i guess thats because PPVCCSA_S0_CPU, PP1V05_S0 and PP1V8_S0_CPU_VCCPLL_R are there but VCORE_S0_CPU, VCORE_S0_AXG and PP1V5_S3RS0 are missing). I checked powerrails and came to a point where i got...

Hello, i have a question regarding the 820-3787 boards. I saw this a few times already so i am curious if somebody know what causes this and how to fix it. This 15" Retina late 2013 works fine but sometimes it shows glitched video. Something like a "splitscreen view" of the same picture on the...

This 820-3115 had waterdamage and wont start. I cleaned that and now it only starts if there is no monitor attached to it (internal and external). It i plug any monitor in fan just twitch once every time i press the power button. Without a screen it chimes but turns off after ~20 seconds. It...

Hello, this 820-00239 had water spilled on it and was dead. I cleaned sone minor corrosion and it worked again except the touchbar. It showed everything fine on the OLED but touch was not working. The cable to J4402 was burned. So i ordered a new Touchbar and replaced the entire Touchbar LCD and...

This 820-3330 can work perfektly fine. Unfortunately only randomly it starts and works. The rest of the time its dead with just an green light (orange light is just there it it decides to start) and fan twitch ~ every 1 second. I can hear a clicking noise (i guess from a transistor?!) if the...