f7000 removed! PPBUS_G3H =4 Ohm / 0.002 in diode mode! when applying 1V the processor heats up a little! is the CPU dead?
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Last edited by PITERPENY; 09-10-2024, 03:48 PM. -
Would you have a thermal camera? It could be the cpu at fault.
review this thread:
https://www.badcaps.net/forum/troubl...9-no-ppbus_g3h -
Yes, I use a thermal chamber. The radiator is removed, only the center of the CPU on the board heats up!
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Hi everyone - first time poster on here looking to embark on my first repair! Thank you in advance for any help!
My Macbook only turns on when the charger is plugged in and only the trackpad and fans show signs of life. The display, caps lock light and touchbar do not turn on. There was previous liquid damage to the touchbar but after cleaning and drying the laptop was operational for a year without any issues. There doesn't seem to be any sign of liquid damage to the board, at present.
What I have done so far:
- All of the routine diagnostic methods including... -
Hi everyone. Just a reminder I am not a professional repair technician, fixing Apple electronics is my hobby.
Recently got my hands on MacBook Pro A2289 with interesting behavior. Pristine condition, no water damage, no visual issues whatsoever. It has no image, no CapsLock, no life except the fan is spinning. But it is able to boot into DFU and recognized by another MacBook. I tried to revive and restore the laptop, but the process ends when the MacBook usually should show an Apple logo with a progress bar. I assume the main power lines and T2 are working. It seems like the Intel... -
Hi,
I hope this is the correct place to post about this device. I originally posted regarding this on iFixit so see the details from that post below:
"I'm hoping someone can give their opinion on the symptoms I'm seeing before I spend any more time and put money into this. I got this MacBook from a customer and after looking at it they decided they didn't want it.
It doesn't turn on and there's no visual signs of life. I have tried resetting the NVRAM, SMC, power cycling, unplugging the battery, using the charger with the battery unplugged. Removed the... -
I have a problem I'm hoping someone can help me with. I have an A2289 MacBook that had some liquid damage. After repairing any areas that had corrosion, I was able to get it to show 20v but only .01a on the multimeter. It was consistent on all ports, however I could not get the MacBook to go into DFU mode. I read that I should refllash U4770 and after grabbing the bin from this site I did just that. After soldering the chip back on the board, now I have DFU mode, but the thing is, it won't revive or restore, giving me the error that the device left the DFU state or something to that effect. The... -
Hi everyone.
Recently got MacBook Pro A2289 with interesting behavior. Pristine condition, no water damage, no visual issues whatsoever. It has no image, no Caps Lock, no life except the fan is spinning. But it is able to connect to DFU mode and recognized by another MacBook. I tried to revive but the process ends when the MacBook usually should show an Apple logo with a progress bar and giving me error AMRestoreErrorDomain error 9. I don't have CPU Vcore.
Now I can't able to connect to DFU mode either.
On the USB meter I got 20V/0.9A power draw, and keep looping....
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