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| {{stub}}
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| {{Repair Guide
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| |Device=
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| |Affects parts=
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| |Needs equipment=
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| |Type=
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| |Difficulty=
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| }}
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| ==Problem description==
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| When charging the A1707 MacBook with a USB-C charger and measuring the input current and voltage with a USB-C meter, the meter does not even turn on at all or 0 current.
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| [[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
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| ==Symptoms==
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| *MacBook not turning on.
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| *All voltages missing.
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| *Not charging.
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| ==Solution==
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| ===Diagnostic Steps===
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| ====Check PP20V_USBC and PPDCIN_G3H resistance====
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| *Measure the resistance between PP20V_USBC and GND with a multimeter on resistance mode
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| **if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
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| *Measure the resistance between PPDCIN_G3H and GND with a multimeter on resistance mode
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| **if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
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| ====Faulty USB-C port====
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| If both rails above are not shorted, it is highly likely that the USB-C port itself is shorted or damaged inside.
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| ===Repair Steps===
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| ====Short on PP20V_USBC or PPDCIN_G3H====
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| [[How to find short circuits]]
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| *Inject 1V to the shorted rail using a Lab Bench Power Supply.
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| **With a thermal camera, identify the source of the short, most likely it is a capacitor
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| *Replace the shorted component.
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| *D3400 / D3300 are possible culprits
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| ====Shorted USB-C port====
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| Replace the offending port.
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| [https://www.youtube.com/watch?v=ssTL3pKda54 Example video]
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Latest revision as of 17:05, 5 November 2023
