MacBook Pro A1707 Not turning on, no shorts repair and MacBook Pro A1707 Battery not recognized repair: Difference between pages

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{{Repair Guide
{{Repair Guide
|Device=MacBook Pro A1707
|Device=MacBook Pro A1707
|Affects parts=Motherboard
|Affects parts=Motherboard, battery
|Needs equipment=multimeter, soldering iron, soldering station
|Needs equipment=Multimeter
|Type=Soldering
|Type=Part replacement
|Difficulty=2. Medium
}}
}}
{{stub}}
{{stub}}


==Problem description==
==Problem description==
<nowiki>#</nowiki>incomplete
MacBook A1707 not recognizing the connected battery
 
Provide a concise description of the issue here. Be  as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.
[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
==Symptoms==
==Symptoms==
*Not turning on
*MacBook not turning on.
*Drawing 0A (no current) on 20V as measured by USB-C meter
*Battery not recognized/charging
==Solution==
==Solution==
====Check for low resistance to ground on SMBUS_SMC_5_G3H_SDA or SMBUS_SMC_5_G3H_SCL====
*First, '''try a known good battery.'''
On older MacBooks, this would result in no battery recognition and a lower voltage on PPBUS_G3H—on USB-C models, it actually results in the machine not turning on at all. Can be caused by a tiny speck of conductive material in the battery connector.
**If it doesn't work, check the battery cable going to the board.
====Check for 0.4 V in diode mode on SMBUS_SMC_5_G3H_SDA and SMBUS_SMC_5_G3H_SCL (red probe on GND)====
***Sometimes there is corrosion here, sometimes the customer tore the bar on the connector off the connector.
if it's higher the I<sup>2</sup>C signals will look funny, not going just between 0 and 3.3 V. Check D6950—it can be blown when the SMC goes.
*In some rare cases the SMC still is a factor in battery recognition on this board.
====Check voltage on PPBUS_G3H====
If you have no or low voltage on this rail, check the repair steps below.
===Repair Steps===
====low resistance to ground on SMBUS_SMC_5_G3H_SDA or SMBUS_SMC_5_G3H_SCL====
Clean the conductive material, [https://www.youtube.com/watch?v=PDKlWu1eDFA&t=254s Video]
====0.4 V in diode mode on SMBUS_SMC_5_G3H_SDA and SMBUS_SMC_5_G3H_SCL (red probe on GND)====
<nowiki>#</nowiki>incomplete
====Low or no voltage on PPBUS_G3H====
It could be bad/dead ISL9239. Also check for ≈2.4 Ω on the two ISL9239 current-sensing circuits. If any of the 1 Ω or current-sensing resistors are blown, replace them first, or you will re-kill any new ISL9239 you try!

Latest revision as of 15:54, 29 October 2023

MacBook Pro A1707 Battery not recognized repair
Device MacBook Pro A1707
Affects part(s) Motherboard, battery
Needs equipment Multimeter
Difficulty ◉◉◌◌ Medium
Type Part replacement


This article is a stub. You can help Repair Wiki grow by expanding it

Problem description

MacBook A1707 not recognizing the connected battery

Example image (Figure 1) -- No image yet. Help expand this page by uploading it!

Symptoms

  • MacBook not turning on.
  • Battery not recognized/charging

Solution

  • First, try a known good battery.
    • If it doesn't work, check the battery cable going to the board.
      • Sometimes there is corrosion here, sometimes the customer tore the bar on the connector off the connector.
  • In some rare cases the SMC still is a factor in battery recognition on this board.