Hellou!
Does anyone have any idea how could you test A2442 820-02098 screen backlight without the whole case,it has huge matrix of leds and i have 0 understanding how that all works.
UngaBungaMacbook
New Member
Last Activity: 01-20-2025, 12:44 AM
Joined: 01-23-2023
Location: Tartu
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Hello!
I am electronic specialist for 3 years now, mostly repairing macbook motherboards, used to repair iPhones as well.
Here to find help and help others
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Re: MacBook Pro 14" M1 Pro Issue (Works but issues)
try swapping out ISL (U5200 if i remember correct). All power goes thru there, sounds like somekind of heat issue, it works 2-3 minutes gets hot and shuts down, when its cooled it works again.Leave a comment:
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Re: [HELP]a1990 820-01041 NOBOOT, STRANGE!
then swap out 3 of the cd32 chips, I use donor boards for chips. I have repaired over 2k macbooks by now. it might happen, usually i have cd32 problems because people are using low quality usb-c cables that are very loose.Leave a comment:
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Re: MacBook Pro 14" M1 Pro Issue (Works but issues)
disconnect trackpad and see if it still restartsLeave a comment:
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Re: [HELP]a1990 820-01041 NOBOOT, STRANGE!
@phantomEVO I am 70% sure it is one of the CD32.... chip issue probably the side where you have no voltage at all, other 30% would say u3000 is burnt a bit or damaged, that also makes macbook 5v in every port. if you have thermal cam, one of the chips should be hotLeave a comment:
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Re: Help needed: 2020 MacBook Pro M1 A2338 (keyboard and trackpad not working)
you can check the voltages on JT400, do you have PPBUS_AON, IPD_LID_OPEN1v8, if yes it might be issue with some I2C lanes or some logic chips from the other side. Usually for me it has been the trackpad connector issues, either 1 lane is not connected or not getting enable signalLeave a comment:
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Re: New Members - please post your introductions here
Hey! I'm from Estonia, working as electronic mostly with apple devices iphones/ipads/macbooks. I'm here to get help and also help others with electronics related topics. I have bachelor degree in computer engineering.Leave a comment:
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