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Apple MacBook Pro A1708 notebook screen darkening repair
Machine model: apple MacBook Pro A1708
Malfunction: The notebook screen is dimmed.
Maintenance process:
An Apple MacBook Pro A1708, the trouble is the notebook’s dark screen. This model has common failing, one is that the screen line is broken, the other is that the motherboard does not have VLED VCC, and some need to change the screen.
Apple MacBook Pro A1708 notebook screen darkening repair Figure 1.
Observe that there is no trace of breakage on the right screen line. Test VCC on the small panel of the screen, and find that there is no VLED main VCC. Test VLED diode value to ground, and find that the resistance is 50 or so, which is low.
Use 3V VCC Current heating test on DC power supply to find high temperature point. After removal, the display is normal, and troubleshooting is done.
Apple MacBook Pro A1708 This position Capacitor is very easy to Short circuit, sometimes it is front, sometimes it is back, focus on testing here.
Apple MacBook Pro A1708 notebook screen darkening repair Figure 2. 
Apple MacBook Pro A1708 notebook screen darkening repair Figure 3.
Apple MacBook Pro A1708 notebook screen darkening repair Figure 4.
Apple MacBook Pro A1708 notebook screen darkening repair Figure 5.
Apple MacBook Pro A1708 notebook screen darkening repair Figure 6.
