A2992 Stuck on 5V and 0.02A Current Draw: Difference between revisions

A2992 Stuck on 5V and 0.02A Current Draw
Device	MacBook Pro A2992
Affects part(s)
Needs equipment
Difficulty
Type	Soldering, Teardown, Cleaning

Latest revision as of 16:27, 20 January 2026

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Liquid damage around C7762 pulling down PP1V8_AWAKE_SEPROM_LDO.

Check USB C Ammeter stuck at 5V and low current draw

Check if PPBUS_AON and PP3V8_AON are present

Proceed to visual inspection of area around C7762 for corrosion

Clean area around C7762 of corrosion

Remove or replace any shorted caps around C7762

Test and repair any corroded traces.

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-{{stub}}
 {{Repair Guide
-|Device=
+|Device=MacBook Pro A2992
-|Affects parts=
+|Type=Soldering, Teardown, Cleaning
-|Needs equipment=
-|Type=
-|Difficulty=
 }}
+{{stub}}
 == Problem description ==
 <!--
@@ Line 15: / Line 13: @@
 [[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
 == Symptoms ==
-<!--
-PPBUS_AON Present at 12.3V and PP3V8_AON also present at 3.8V.
+* USB Ammeter stuck at 5V
--->
+* PPBUS_AON Present
-* Symptom 1 (Figure 1)
+* No Magsafe Charging Light
-* Symptom 2
+* No Power
 == Solution ==
-<!--
+Liquid damage around C7762 pulling down PP1V8_AWAKE_SEPROM_LDO.
-Liquid damage around C7762 PP1V8_AWAKE_SEPROM_LDO. Clean up corrosion and rebuild any burned traces.
--->
 === Diagnostic Steps ===