MacBook Pro A1990 Not turning on, drawing 0.11A at 20V repair and IPhone 5: Difference between pages

IPhone 5
Manufacturer	Apple
Code name	A1428, A1429, A1442
Release date
Device type	Phone

Latest revision as of 12:09, 2 March 2024

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Guides

Explanatory Guides

Repair Guides

	Affects part	Type	Difficulty
IPhone 5 "FindFlashMediaAndKeepout" error while booting repair	Main Logic Board	Soldering Part replacement	3. Hard

Device pictures

PCB pictures

Reference measurements (also schematics if available)

More Information/External Sources

Notice for all iPhone 5 models: Be careful when disconnecting the battery, if you dig in between the connector and shield behind it you can knock off a VERY VERY small resistor, there's many of them and depending on which ones you knock off you can get strange issues like battery percentage misreporting or the phone only working when plugged in.

Models
A1428
A1429
A1442

@@ Line 1: / Line 1: @@
-{{Repair Guide
+{{Device page
-|Device=MacBook Pro A1990
+|Manufacturer=Apple
-|Affects parts=Motherboard
+|Has code name=A1428, A1429, A1442
-|Needs equipment=multimeter, soldering iron, soldering station, thermal camera
+|Device type=Phone
-|Type=Soldering
-|Difficulty=3. Hard
 }}
 {{stub}}
-==Problem description==
-A1990 MacBook not turning on and only drawing 0.11A at 20V
-[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
-==Symptoms==
-*MacBook not turning on
+==Guides==
-*current draw of 0.11A at 20V as shown by USB-C meter
+{{List Guides}}
-==Solution==
+==Device pictures==
-PP2V5_NAND_SSD0 can be shorted (in this case, PPBUS_G3H luckily didn't go to SSD)
+<gallery showthumbnails="1">
+File:Example device pictures.jpg
+</gallery>
-I replaced SSD buck converter but the short was still there, found a shorted cap on the other side of the board C9088 which relieved the short on PP2V5_NAND_SSD0
+==PCB pictures==
+<gallery showthumbnails="1">
+File:Example pcb pictures.jpg
+</gallery>
+==Reference measurements (also schematics if available)==
+<gallery showthumbnails="1">
+File:Example measurement pictures.jpg
+</gallery>
+==More Information/External Sources==
+'''Notice for all iPhone 5 models:''' Be careful when disconnecting the battery, if you dig in between the connector and shield behind it you can knock off a VERY VERY small resistor, there's many of them and depending on which ones you knock off you can get strange issues like battery percentage misreporting or the phone only working when plugged in.
+{| class="wikitable"
+|Models
+|-
+|A1428
+|-
+|A1429
+|-
+|A1442
+|}