MacBook Pro A1708 Not turning on, pulling 0.02A at 20V repair: Difference between revisions
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(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== <nowiki>#</nowiki>incomplete thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it! ==Symptoms== *Not turning on *Pulling 20 milliamps at 20V as measured by USB-C meter ==Solution== * Constant low power draw (10–20 mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)...") |
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{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=MacBook Pro A1708 | ||
|Affects parts= | |Affects parts=Motherboard | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station, thermal camera | ||
|Type= | |Type=Soldering, Micro-Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
{{stub}} | |||
==Problem description== | ==Problem description== | ||
<nowiki>#</nowiki>incomplete | <nowiki>#</nowiki>incomplete | ||
Revision as of 09:21, 27 October 2023
| MacBook Pro A1708 Not turning on, pulling 0.02A at 20V repair | |
|---|---|
| Device | MacBook Pro A1708 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station, thermal camera |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering, Micro-Soldering"Micro-Soldering" is not in the list (Soldering, Teardown, Part replacement, Cleaning, Software, BGA, General) of allowed values for the "Repair Guide type" property. |
This article is a stub. You can help Repair Wiki grow by expanding it
Problem description
#incomplete
Symptoms
- Not turning on
- Pulling 20 milliamps at 20V as measured by USB-C meter
Solution
- Constant low power draw (10–20 mA): Short to ground on power rail (can be PPBUS_G3H, PP3V3_S5, PP3V3_S4,...)
Example video (19–20 mA draw, 0.7 Ω short to ground on PPBUS_G3H caused by bad capacitor, 1 Ω resistor of current sensing circuit from U7000 (ISL9239) also blown)
- Missing PP3V3_S5G missing due to missing PM_EN_P3V3S5G, caused by bad (solder of) U7800 (PMIC), or corroded capacitors near it
Example video (Short to ground on PP3V3_S4, PPBUS_G3H 13.7 V, bad capacitor, also damage to USB-C port, replaced CD3215 + other problems) Power cycling 10–30 mA at 20 V: Check for short to ground on PP5V_S4