f7000 removed! PPBUS_G3H =4 Ohm / 0.002 in diode mode! when applying 1V the processor heats up a little! is the CPU dead?
-
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!
Comment
-
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.... -
Hello to all ! I follow you but this is first time write !!
your forum is the best !!
so I’ve a2289 with water damage ! In first time other friend have clean and work ! But after some time stop working !
now, I open the MacBook and I see a lot of corrosion near backlight circuit (I attach some photos about that ) I think the problem is on backlight maybe bcs do strange boot then reboot (attach video ) I change some thing on the circuit like :
q8400
q8401
D8410
and the resistor R8431
if I check PPVIN SOSW LCDBKLT_R I’ve 12,9v
on...04-03-2025, 06:45 PM
Comment