MacBook Pro A1989 Charger not turning on USB-C meter repair and MacBook Pro A1989 Battery not recognized repair: Difference between pages

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(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== MacBook A1989 not recognizing the connected batterythumb|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. **...")
 
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{{Repair Guide
{{Repair Guide
|Device=MacBook Pro A1989
|Device=
|Affects parts=Motherboard
|Affects parts=
|Needs equipment=multimeter, soldering iron, soldering station, thermal camera
|Needs equipment=
|Type=Soldering, Micro-Soldering
|Type=
|Difficulty=3. Hard
|Difficulty=
}}
}}
{{stub}}
==Problem description==
==Problem description==
When charging the A1989 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.[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
MacBook A1989 not recognizing the connected battery[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
==Symptoms==
==Symptoms==
*MacBook not turning on.
*MacBook not turning on.
*All voltages missing.
*Battery not recognized/charging
*Not charging.
==Solution==
==Solution==
===Diagnostic Steps===
*First, '''try a known good battery.'''
====Check PP20V_USBC and PPDCIN_G3H resistance====
**If it doesn't work, check the battery cable going to the board.
*Measure the resistance between PP20V_USBC and GND with a multimeter on resistance mode
***Sometimes there is corrosion here, sometimes the customer tore the bar on the connector off the connector.
**if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
*In some rare cases the SMC still is a factor in battery recognition on this board.
*Measure the resistance between PPDCIN_G3H and GND with a multimeter on resistance mode
**if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
====Faulty USB-C port====
If both rails above are not shorted, it is highly likely that the USB-C port itself is shorted or damaged inside.
===Repair Steps===
====Short on PP20V_USBC or PPDCIN_G3H====
[[How to find short circuits]]
*Inject 1V to the shorted rail using a Lab Bench Power Supply.
**With a thermal camera, identify the source of the short, most likely it is a capacitor
*Replace the shorted component.
====Shorted USB-C port====
Replace the offending port.

Revision as of 14:45, 14 October 2023

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MacBook Pro A1989 Battery not recognized repair
Device
Affects part(s)
Needs equipment
Difficulty
Type


Problem description

MacBook A1989 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.
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