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I have Windows installed on a external SSD and I booted this computer from that drive and it still seems to be a little sluggish but not as bad as in Mac OS. The default display resolution in Windows is set to 2880x1800, and it does not allow me to change it. I checked device manager and it...

I removed J9600 from the board and jumped the connections using wires and now the voltages seem back to normal, but still SSD not recognized. I took a look at the board under thermal camera and I can see that U8605 is getting warm, so I am thinking its bad. Can this chip be changed, or is it...

Diagnostic mode reports no issues found everytime. The computer is still slow in safe mode also. WindowServer process is always running and when I open Youtube and start playing a video, it jumps up to over 150% CPU usage.

Well I ran a ram test and it passed so I am not really convinced it’s a ram issue. I tried to erase the disk and reinstall MacOS but that did not seem to help. The computer just seems to be running slow and lagging, and its sometimes will completely freeze up and then send me back to the login...

Same issue with just a external monitor attached.

Hello. I have a 820-00923 board that is liquid damaged. The liquid spill seems to have only affected the side of the board with J4402 on it. J4402 was badly damaged and so was the flex cable for the touchbar. I have removed the damaged J4402 from the board for now, and the computer turns on but...

Yea finding a donor board for this model is not easy. I resorted to purchasing another broken A1989 on ebay that supposedly did not power on, to use for parts. Turns out this macbook I bought for parts actually works and is fully functional, so I was not going to start removing UB000 from this...

J9600 looks perfect on this board. I do not see any reason why it would have a bad connection, but the voltages I am getting seem to suggest that. I have tried to clean it and have also tried to use different plates from donor boards, but I still am not getting the correct voltages. Can I remove...

All the information I have posted is accurate. Pin 44 of J9600 goes to PP3V3_S5_POLARIS, not PPBUS_G3H. Here are the voltages I am currently getting at J9600 with the plate attached and secured properly. PP3V3_S5 3.3 SSD_BOOT_L 0 SSD_PWR_EN 3.25 SSD_RESET_L 3.28 SSD_CLKREQ_L...

I did not check if the PCH temp was 128 before flashing the BIOS. The BIOS I used was a known good one from a working macbook that was unmodified, so it did not have a clean ME. I have cleaned the ME region on this BIOS now and re flashed it and now the PCH temp is back to normal. The new BIOS...

Damn that's what I was afraid of. I was not sure since it looks like its using the correct amps as a good board and PP3V3_S0 does not go directly to the CPU.

Hello. I got a 820-00840 that was originally stuck on 5v. I had to replace both CD3215 chips and got 20v back and the board booted and it seemed to be working fine. Then I restarted it and tried to run apple diagnostics and during the test, the computer just turned off and would not turn back...

This model requires a good battery to be connected or it wont boot and the fans will spin high. Connect a good battery to it and see if it boots

I compared diode mode on J9600 with a good 820-00281 board and they all seem normal. Where is the thermal sensor for PCH die? Is it built into the PCH?

I ran HW Monitor and it shows that PCH die is 128 Celsius, which is not normal.

I am able to boot into USB macOS in safe mode, but SSD is still not recognized. Tried to run this command in terminal (diskutil eraseDisk JHFS+ SSD disk0) but it gives me this error. Error: -69877: Couldn't open device. I have tried another top case already with battery but it did not change.

Yes it is screwed down securely. I removed J9600 and the connector looks clean. I have posted voltages below for the pins you mentioned both with the plate attached and removed from J9600. Without plate attached: Pin 4 - 0.378 Pin 6 - 0.378 Pin 12 - 0.388 Pin 14 - 0.39 Pin 44 - 1.036 With...

Hello. I got another 820-00928 which looks very clean. No signs of liquid damage or corrosion, but it does not see the internal SSD. It is also slow to start it seems, and take 10 minutes or more to get to the flashing folder icon. When I plug in the charger and hold down the option key, it...

I started working on this board again because I got a donor board in that had a RAM chip still on it. 0.031 is a good diode mode measurement for PP1V5R1V35_S0_GPU_MEM. I confirmed this with a few other boards. I knew the issue was with one of the RAM chips so I replaced one at a time and tested...

Yes I am getting all the same voltages as I posted previously in post #2. PLT_RST_L is 3.3v