These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
+
+
***UPDATE 10/22/2022***:
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
I continue to be perplexed as to why this serialized pairing is necessary for proper function, but that's a whole different discussion.
-
***UPDATE: 11/26/2022***:
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***UPDATE 11/26/2022***:
As info continues to come in about repairing these models, here's the latest on what the independent repair community is finding. The TCON Board on these is underneath the bezel at the bottom of the display rather than attached to the cables dangling from the screen. [br]
[br]
If you're replacing the display and not using Apple's Self Repair program where System Configuration is accessible, there are two ICs (Integrated Circuits, or more commonly - chips) that need to be transplanted from the original TCON board to the new one to maintain the configuration. This not really a viable fix for most DIYers, since it requires the skills and tools desolder and solder BGA components, but it's how people outside Apple's authorized repair ecosystem are resolving this issue. I will try and find some pictures for reference, but I don't have any of these in my spare parts bin yet.
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***UPDATE 12/13/2024:*** The release of macOS Sequoia 15.2 has resolved this issue as long as the screen is an authentic Apple display. The swapping of the integrated circuits is no longer necessary to remove these artifacts. If they are present on your device after a screen replacement, be certain that it is running at least this version of the operating system.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
***UPDATE 10/22/2022***:
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
I continue to be perplexed as to why this serialized pairing is necessary for proper function, but that's a whole different discussion.
***UPDATE: 11/26/2022***:
As info continues to come in about repairing these models, here's the latest on what the independent repair community is finding. The TCON Board on these is underneath the bezel at the bottom of the display rather than attached to the cables dangling from the screen. [br]
[br]
-
If you're replacing the display and not using Apple's Self Repair program where System Configuration is accessible, there are two ICs (Integrated Circuits, or more commonly - chips) that need to be transplanted from the original TCON board to the new one to maintain the configuration. I will try and find some pictures for reference, but I don't have any of these in my spare parts bin yet.
+
If you're replacing the display and not using Apple's Self Repair program where System Configuration is accessible, there are two ICs (Integrated Circuits, or more commonly - chips) that need to be transplanted from the original TCON board to the new one to maintain the configuration. This not really a viable fix for most DIYers, since it requires the skills and tools desolder and solder BGA components, but it's how people outside Apple's authorized repair ecosystem are resolving this issue. I will try and find some pictures for reference, but I don't have any of these in my spare parts bin yet.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
-
UPDATE 10/22/2022:
+
***UPDATE 10/22/2022***:
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
-
I continue to be perplexed as to why this serialized pairing is necessar for proper function, but that's a whole different discussion.[br]
+
I continue to be perplexed as to why this serialized pairing is necessary for proper function, but that's a whole different discussion.
+
***UPDATE: 11/26/2022***:
-
***Extra info just because***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
-
-
More data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to bet all this processing is done on the logic board itself.
-
-
For point of comparison, here are the two connectors from 16" models. BCON is dedicated backlight, eDP includes both display signals, and backlight signals.
-
-
[image|2719832|caption=BCON connector MacBook Pro 16" 2021]
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-
[image|2719830|caption=eDP connector MacBook Pro 16" 2019]
+
As info continues to come in about repairing these models, here's the latest on what the independent repair community is finding. The TCON Board on these is underneath the bezel at the bottom of the display rather than attached to the cables dangling from the screen. [br]
+
[br]
+
If you're replacing the display and not using Apple's Self Repair program where System Configuration is accessible, there are two ICs (Integrated Circuits, or more commonly - chips) that need to be transplanted from the original TCON board to the new one to maintain the configuration. I will try and find some pictures for reference, but I don't have any of these in my spare parts bin yet.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
-
What was the reason you replaced the logic board?
+
UPDATE 10/22/2022:
-
***EDIT***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
+
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
+
+
I continue to be perplexed as to why this serialized pairing is necessar for proper function, but that's a whole different discussion.[br]
+
+
+
***Extra info just because***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
More data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to bet all this processing is done on the logic board itself.
For point of comparison, here are the two connectors from 16" models. BCON is dedicated backlight, eDP includes both display signals, and backlight signals.
[image|2719832|caption=BCON connector MacBook Pro 16" 2021]
[image|2719830|caption=eDP connector MacBook Pro 16" 2019]
-
-
-
-
UPDATE 10/22/2022:
-
-
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
-
-
I continue to be perplexed as to why this serialized pairing is necessar for proper function, but that's a whole different discussion.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
What was the reason you replaced the logic board?
***EDIT***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
More data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to bet all this processing is done on the logic board itself.
For point of comparison, here are the two connectors from 16" models. BCON is dedicated backlight, eDP includes both display signals, and backlight signals.
[image|2719832|caption=BCON connector MacBook Pro 16" 2021]
[image|2719830|caption=eDP connector MacBook Pro 16" 2019]
+
+
+
+
UPDATE 10/22/2022:
+
+
In light of some info coming in now that Apple's Self Repair is live for MacBooks, it appears this is related to "Calibration" performed by Apple. Basically, the screen (and Lid Angle Sensor) are paired to the logic board, which enables whatever Mini-LED magic the display is doing. So if your display and logic board are not paired together with Apple's software, you're likely to get this issue.
+
+
I continue to be perplexed as to why this serialized pairing is necessar for proper function, but that's a whole different discussion.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
What was the reason you replaced the logic board?
***EDIT***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
-
But more data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to get all this processing is done on the logic board itself.
+
More data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to bet all this processing is done on the logic board itself.
For point of comparison, here are the two connectors from 16" models. BCON is dedicated backlight, eDP includes both display signals, and backlight signals.
[image|2719832|caption=BCON connector MacBook Pro 16" 2021]
[image|2719830|caption=eDP connector MacBook Pro 16" 2019]
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
What was the reason you replaced the logic board?
***EDIT***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
But more data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to get all this processing is done on the logic board itself.
-
[image|2719832|caption=MacBook Pro 16" 2019]
+
For point of comparison, here are the two connectors from 16" models. BCON is dedicated backlight, eDP includes both display signals, and backlight signals.
-
[image|2719830|caption=MacBook Pro 16" 2021]
+
[image|2719832|caption=BCON connector MacBook Pro 16" 2021]
+
+
[image|2719830|caption=eDP connector MacBook Pro 16" 2019]
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
What was the reason you replaced the logic board?
+
+
***EDIT***: Just had a look at the schematics for this (well, the 16" model, which is similar) and there are a LOT more data lines related to backlight coming from the board on these models. In fact it has its own thicc (yes with two c's on purpose) backlight cable that goes directly to the logic board.
+
+
But more data lines means more information used to regulate backlight. Without spending all morning dissecting the schematic, I am willing to get all this processing is done on the logic board itself.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
-
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that. If it is occurring with different displays after the board was replaced,
+
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that.
These new MacBooks have mini LED type displays, and have more dimming zones (small areas where the backlight can be regulated independent of other areas). I am thinking it's possible there's something up with the backlight related to the new board.
I am not super familiar with the boards on these because they are so new and I would be much more likely to think this is related to the display. But if it is occurring with different displays, that seems to rule that out. I suppose its possible there's something to this related to pairing to the logic board, as Apple is wont to do. But I have no practical evidence for that. If it is occurring with different displays after the board was replaced,
What was the reason you replaced the logic board?