MacBook Pro A2251 20V on USB-C, 0.00-0.01A current draw repair and MacBook Pro A2289 No camera detected repair: Difference between pages
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{{Repair Guide | {{Repair Guide | ||
|Device=MacBook Pro | |Device=MacBook Pro A2289 | ||
|Affects parts=Motherboard | |Affects parts=Motherboard, Camera, Display assembly | ||
|Needs equipment=multimeter, soldering iron, soldering station | |Needs equipment=multimeter, soldering iron, soldering station | ||
|Type=Soldering | |Type=Soldering | ||
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}} | }} | ||
{{stub}} | {{stub}} | ||
== Problem description == | ==Problem description== | ||
Addressing issues with MacBook Pro ''820-01987'' not detecting the camera. | |||
[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]] | |||
==Symptoms== | |||
* Camera not detected | |||
* | * Possible burned or exploded L8504 filter on TCON board | ||
== Solution == | ==Solution== | ||
=== Diagnostic Steps | ===Diagnostic Steps=== | ||
==== Check L8504 Continuity ==== | |||
* Use a multimeter in continuity mode to check L8504 (Figure 1). | |||
* Normal reading should be close to 0.01. | |||
* If L8504 is blown or burned, proceed to the "L8504 blown or visibly burned repair steps" below. | |||
==== | ==== Test with Known Good Display ==== | ||
* If | * Verify camera function using a KNOWN GOOD display assembly. | ||
* If the camera works with a different display, the original display might be faulty. | |||
* Make sure to check L8504 before diagnosing the display issue. | |||
=== | ===Repair Steps=== | ||
* | ==== Camera Works with Known Good Display ==== | ||
If camera works with a known good test display, replace the display assembly. | |||
==== L8504 Blown or Visibly Burned ==== | |||
* Understand that L8504 failure indicates a catastrophic short within the TCON board of the display or a melted/corroded display cable/connector. | |||
* Repair L8504 only after addressing the display issue, as L8504 might fail again if the display issue persists. | |||
* When replacing L8504, address corresponding pad and trace damage. | |||
* Use 36 or 37 AWG enamel coated copper wire for jumper wires due to webcam and ambient light sensor power requirements. | |||
* Connect jumper wire from the input side of the filter (PP5v_G3S) to R5610 (Figure 2) or a suitable point. | |||
* Apply conformal coating to jumper wire. | |||
* Use a 120 Ohm ferrite filter rated for 1.5 amps (402 package size). | |||
* After replacing L8504 and addressing trace issues, replace the display assembly or repair it by replacing damaged cables/connectors. | |||
==== No Camera Function, L8504 Normal ==== | |||
* Attempt to restore T2/BridgeOs firmware via Apple Configurator 2 by entering DFU mode. | |||
* Ensure your Mac is on the latest macOS version. | |||
* Follow Apple's support article on reviving or restoring T2/BridgeOs firmware. | |||
* If no camera function after firmware revive, and other causes are ruled out, U8504 might be faulty, or there could be trace/resistor issues between the camera connector/U8504 or between U8504 and the T2 chip. | |||
* A hardware issue with the T2 chip might also cause camera detection problems. | |||
Latest revision as of 15:28, 29 October 2023
| MacBook Pro A2289 No camera detected repair | |
|---|---|
| Device | MacBook Pro A2289 |
| Affects part(s) | Motherboard, Camera, Display assembly |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
This article is a stub. You can help Repair Wiki grow by expanding it
Problem description
Addressing issues with MacBook Pro 820-01987 not detecting the camera.
Symptoms
- Camera not detected
- Possible burned or exploded L8504 filter on TCON board
Solution
Diagnostic Steps
Check L8504 Continuity
- Use a multimeter in continuity mode to check L8504 (Figure 1).
- Normal reading should be close to 0.01.
- If L8504 is blown or burned, proceed to the "L8504 blown or visibly burned repair steps" below.
Test with Known Good Display
- Verify camera function using a KNOWN GOOD display assembly.
- If the camera works with a different display, the original display might be faulty.
- Make sure to check L8504 before diagnosing the display issue.
Repair Steps
Camera Works with Known Good Display
If camera works with a known good test display, replace the display assembly.
L8504 Blown or Visibly Burned
- Understand that L8504 failure indicates a catastrophic short within the TCON board of the display or a melted/corroded display cable/connector.
- Repair L8504 only after addressing the display issue, as L8504 might fail again if the display issue persists.
- When replacing L8504, address corresponding pad and trace damage.
- Use 36 or 37 AWG enamel coated copper wire for jumper wires due to webcam and ambient light sensor power requirements.
- Connect jumper wire from the input side of the filter (PP5v_G3S) to R5610 (Figure 2) or a suitable point.
- Apply conformal coating to jumper wire.
- Use a 120 Ohm ferrite filter rated for 1.5 amps (402 package size).
- After replacing L8504 and addressing trace issues, replace the display assembly or repair it by replacing damaged cables/connectors.
No Camera Function, L8504 Normal
- Attempt to restore T2/BridgeOs firmware via Apple Configurator 2 by entering DFU mode.
- Ensure your Mac is on the latest macOS version.
- Follow Apple's support article on reviving or restoring T2/BridgeOs firmware.
- If no camera function after firmware revive, and other causes are ruled out, U8504 might be faulty, or there could be trace/resistor issues between the camera connector/U8504 or between U8504 and the T2 chip.
- A hardware issue with the T2 chip might also cause camera detection problems.