Early 2011 MbPro EMC 2419 bad (no error) read bin

Looking forward to hearing about your resolution.

One of the most important things is to get proper voltage to the chip pins. This can be a bit of a challenge in some environments. The biggest thing for you is you actually have a read it is just bad. You need to adhere strictly to the requirements for reading and writing that can be found in your chips datasheet. Don't give up. because this is really a simple task that can be done in a matter of minutes when you get the initial shock of it out of the way.

DeboTech wrote: I had a situation like this as well. What I did and I'm not sure it's the best solution. But I turned the computer on. I allowed it to run through the writing stage. All went well with the process. I know if anything is touched wrong there could be a shortage.

Just to add to this a bit, the reason this worked in your case was because the Mac needed power to something. What i mean is, the voltage was being drained from the pi somehow and the chip during read likey was failing or succeeding with a corrupt file. Supplying voltage to the board during the flashrom operation can remedy the situation.

Just for any of you reading this post, I do not think it wise to actually have the Mac powered on during the read/write process. And I think it is best to have pullup resistors on the 3.3v wires to be safe. The A1466 models are especially a pain in the rear when it comes to this process. Case in point; I have an A1466 that I fixed for a guy and he loaned it to me to help develop the MBA Easy FLash clips. I have not been able to reach this guy ever since HackMack.org went offline. So the battery finally drained on it as it was sitting in the corner. I grabbed it one day to test a batch of clips and couldn't get a good read to save my life! I threw it back in the corner as I was able to get the clips working on another Mac. I still haven't heard from the guy, so I decided to buy a SSD for it and use it. I am not going into detail of the nightmare I have had with this thing since, but I have a charger for it now and let it charge over night. After running into issues with installing OS X to the damned thing, I finally decided to try and pull the firmware and write another version back to it. I thought I was in for a ride, but I hooked it up to my pi and it read first try.

That long story just to tell you I had issues reading/writing one after letting the battery drain and when the battery was charged all my issues went away. Every mac is different so I think its best to start with no power and no charger connected to the logic board just to see if will read/write successfully, and then work your way up the latter by adding battery and then eventually the magsafe.

The whole point of this little sermon is to get through to you all that voltage stability while reeding any EEPROM is extremely important! Without having a steady and correctly applied voltage it will not work.

Keep us posted!

Very nice!

Brother, that is exactly what we need! Where did you get a 2015 schematic?? Would you be interested in taking on the task of getting as many pinouts as possible? We will need these for my future clip rev 4.

If so, we should start a thread or even a database with this type of information. PM me about this if you are interested in contributing please.