Checked all the surrounding circuitry but found nothing. Looks very clean and complete.
Camera_Power_EN is 3.28v when initially starting to boot outside the housing. It stops for a few seconds then begins to interval at 0v and 3.28v continuously after half the booting process is done and even when the system is fully on.
ahoonid
CapsLOCK
Last Activity: 04-10-2025, 04:01 PM
Joined: 06-28-2023
Location: Frankfurt
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Thanks mon2. I've already watched this video and we have different issues. His camera is being recognized and he has green light on the camera when opening any camera app. The component on his laptop is in good condition on mine.Leave a comment:
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Would appreciate any input fellas. Is this a common issue on this model? Can't seem to find many threads on camera issues on forums.Leave a comment:
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820-00840 No camera detected
Hey everyone,
I bought a MacBook Pro 2017 A1708 to repair. I bought it knowing one usb port is not working (completely dead) and no usb data transfer possible from the working port as well (only charging).
I replaced the CD3215 chip and also changed the usb redriver chip on the other side of the motherboard which is not in the boardview and schematic (there was a small hole on it).
Now the motherboard is completely back to life and both ports work without any issues. This was a little history from the device. No prior signs of repair before I start as well.... -
C17QG51QFVH3 is the serial number that I need. Sorry I forgot to write it....Leave a comment:
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Hey everyone,
I tried creating a bios dump of a 820-4924A macbook pro to change the serial number. I didn't verify the dump and quickly erased the chip before making sure it's a good copy and now the bios seems a bit corrupt.
Now since I wanted to write the original SN of the previous damaged board, I simply created a dump from the original motherboard and wrote it on the new motherboard's bios chip. I then remembered the whole ME region issue and now I am stuck. I tried to follow piernov's video on how to clean the ME but got confused half the way through 😅.
...Leave a comment:
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Yes indeed. But out of bad luck of having another bad io board, I completely disregarded any possible issues with io 😅 my bad anyways. Goes to show how important it is to not just double but triple check stuff sometimes!
Cheers mate....Leave a comment:
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Thanks for all your inputs and feedback mon2. I finally fixed it. Unfortunately it was a faulty io board all along!! My spare io seemed to have the same problem and I only found out by chance when I tried the board inside another laptop! It was never the magsafe itself as I tried it with many other laptops. Probably something faulty with the one wire circuit on the io.
Appreciate your help anyways 👌...Leave a comment:
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It is 3.42v surprisingly!
tested from R5127 and C5127 and the testpad nearby....Leave a comment:
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1: 8.60
2: 16.49
3: 16.28
I did this measutments with the MLB inside the laptop only disconeecting the battery. The magsafe light was on for a minute, I took the measurments, and then the light turned off! The laptop is still up and running and system information confirms the charger is connected!
Charger is original 65w magsafe.
I get the same values on D7005 with the charger light out....Leave a comment:
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Do you think I should go ahead mon2?...Leave a comment:
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Yes I have the 18v indeed. I am dead sure about my magsafe being genuine. The magsafe cabe connected to my PSU is also geniune. They have no issue with working devices!
As for the LIO, I tested an original and working one from another device and still got the same issue. connectors on both side seem very clean.
One thing I noticed after leaving the device for a few days was that the magsafe light from the original charger wouldn't turn on at all. The system information was recognizing it as connected but in front of charging was written No. I waited for a few minutes and even...Leave a comment:
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Red on 1 Black on 3: Beeps once and shows .197v
Reverse: No beep and shows 1.930v
Red on 2 Black on 3: Beeps once and shows .199v
Reverse: No beep and shows .0Lv
Does it confirm the issue must be here?...Leave a comment:
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Thanks for your input reformatt.
I checked voltage on R7012 with only the battery connected and both pins show 0v.
On D7005 with only the battery:
Pin 1: 7.66v
Pin 2: 0.09v
Pin 3: 7.47v
On R7180 which, I initially got 8.40v but it dropped a little every time I connected the multimeter probes and finally stopped at 7.38v.
So is it the D7005 that's leaking via pin 2?Leave a comment:
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I read the reference logiwiki and compared the behavior of an original magsafe against my psu. With the original magsafe connected to the bare bone MLB, I get random turning off of the orange light and turning back on, and the fan starts to spin at high speed.
with the psu however, the charger is green then orange then green and this goes on until the light is off and shortly turning back on. Sometimes it draws power and the fans are on but most of the times it's not drawing any power when the psu is connected to bare bone MLB. When everything is connected, specially the battery,...Leave a comment:
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This might be a very stupid question but the q7180 mosfet only has 4 pins as far as I see but the board view shows pin 1 to 6 under it! How does that work? 😅
I'm getting 20v throughout the mosfet with my psu connected, and 15v when connecting original 45w magsafe which are normal I suppose.Leave a comment:
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I'm getting 2 and 0 ohms as you mentioned. At this point should I go ahead and replace U7100?Leave a comment:
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Ahh ok I thought you wanted resistance to ground.
53 kOhm is what I get then. Really hard probing tho as the pins were by each other and very small 😁Leave a comment:
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Pin #17: 3 not giving me a number! Ranges from 3 kOhm to 40 kOhm and going up. Sometimes around 100.
Pin #18: Gives a number. Most of the times 107 kOhm.Leave a comment:
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