Today, I started working on a MacBook Pro A2289 it showed only 5 volts with .345 amps while plugged in. I was able to find a hot spot via thermal camera on the FDMF5808A (U7220) which I believe is some type of CPU monitor chip. Once chip was removed the laptop booted without issue, I do not have a backup chip currently available I had to order one. My question is will utilizing laptop without said chip cause any type of damage?
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
When replacing the screen of this MacBook model, the DP855A chip must be moved from the existing screen for the screen to operate properly.
However, when I removed the DP855A chip from the existing screen, I must have done something wrong and the chip broke.
Testing the chip pins with a multimeter revealed a short circuit inside the chip.
Is it impossible to repair this? I couldn't find a programmer for this chip, nor any eeprom programmer software....04-19-2024, 08:51 PM -
Common SPI bios chip programming Questions and Answers
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Q: I have a bios request,i can`t post my backup as i can`t read from the chip.
A: If you can`t read from it how do you expect to write to it ?.
Q: Why is my bios chip unreadable ?.
A: The programmer is faulty or has a worn or broken zif socket.
The USB cable is frayed,connector pins worn or some other physical damage.
Not enough amperage or voltage to power the programmer properly.
Bad...09-02-2021, 04:40 PM -
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 have a2338 MacBook with one bad CD3217 chip. Are there any compatible chips on aliexpress that actually work? Or only chip from same motherboard can be used?
I remember buying one CD3215 for older 15" model on aliexpress and that one worked.
Thanks!