You have 20v so believe the cd3215 are working.
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maybe this board also has problems with the thunderbolt firmware?Comment
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You have 20V so not TBT linked IMO. Do consider a BIOS reflash but backup the original. PS: Do you have a warehouse of boards in your facility? Nice to have if you do
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oh yes, I have a whole box of boards of any kind! with my knowledge there are more and more of them! I'll try to upload a bios from a donor! If it doesn't work, I'll ask you)
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so I rewrote several options for the OS, including with a clean region, the board consumption is still = 0V, substitution from other boards also did not give anything! I installed a BIOS chip from this board onto another one and it starts it up! Apparently we need to look for the reason elsewhere (
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Review and share the details from post # 19.Comment
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What is the voltage to ground of the following points? Given that your PPBUS_G3H is boosted, these lines should be ok but do confirm it. Along with the current PPBUS_G3H voltage to ground.
SMBUS_SMC_5_G3_SCL
SMBUS_SMC_5_G3_SDA
After you attempt to power up, what is the current draw ? Stuck @ 0A ? What is PPBUS_G3H? Stable voltage till you unplug the adapter?Comment
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Is the other unit that is working with a battery? Test this one with a battery.Comment
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I fiddled with it for 2 weeks, replaced the PCH (U1100) and the MacBook came to life. therefore, if A1707 consumes 0.000A, I think 99% of PCH(U1100) should be replaced.
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Very nice! Personally would have tossed it. Share the details of the donor PCH. Anything special or just replaced from another A1707 donor board?Comment
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I took it from the same donor board). but since it’s green I think it’s a product from Intel)
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Awesome! Thanks for the updates and pix. For this series, I believe they are all from Intel. Later models have the Apple silicon.Comment
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Hi guys I have a Macbook a1707 with motherboard 820-00281, without liquid damage that behaves strangely, with the battery connected the Macbook does not turn on and the USBC meter stops at 5v in loop, when I disconnect the battery the Macbook turns on and works fine, I have already tried to replace the battery twice without success, as soon as I connect the black cable of the battery the Macbook does not turn on, it stops at 5v and in loop. -
Hello there
I have problem with Macbook Pro 15" 2017, model 2017, MB code 820-00928.
I bought it as broken with some artefacts on the screen, first I thought that this is problem with ribbon cable but after inspectiing ribbon cable I know it is fine. I tried to reinstall macOs and then I figured out that this must be something with GPU as installation freezes at the end (when drivers are loaded). I installed Windows and was able to install every each of drivers except GPU driver, as soon as I tried to install GPU driver - black screen and restart.
...11-21-2024, 05:25 AM -
Hi,
I'm having an issue with an A1707 MacBook Pro—there's no audio output. Initially, the MacBook came in with a no-power problem, and I found a faulty U6400, which I've now replaced. The laptop now powers on, but there's still no sound.
I've also replaced U6300, but the problem persists.
Here are the current voltage readings:- PPV18_S0: 1.8V
- R6402: 1V
- R6405: 1V
- R6403: 1V
- AUD_SPKRAMP_RESET_L: 1.3V
- PPBUS: 12.6V
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Hello everyone,
I'm currently diagnosing a MacBook Pro A1707 motherboard that does not power on. I've gathered some data but am stuck and need expert advice.
Note that i'm a beginner in electronics and i'm trying to learn while trying to repair this macbook that my work gave me. I'm really curious and love understanding how thing works and i already learned so much.
Only one usb c port is taking 20v and have 12.5v on PPBUS_G3H. when trying other ports, 2 are not going to 20v and one is going to 20v but the CD3215 is getting really hot.
Observations... -
Hello,
Namaste!
We have a Macbook A1707 which came in for repair. Someone had already tried to work on it and there were traces oh heat and burns on the board.
The charger was Stuck at 5v and the there was some caps shorted around U3100.
Turns out there was corrosion under U3100. Same was Reflowed and the Macbook turned on. Works fine but having 1 issue whenever the Macbook is idle and goes into sleep mode. It will WAKE for 1 Second and then do a restart.
It will Display a Black Screen with error message saying Macbook Restarted because of a problem....
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