IPhone XR not powering on & not charging and IPhone XR Stuck in DFU, updates successfully but goes back to DFU: Difference between pages

IPhone XR Stuck in DFU, updates successfully but goes back to DFU
Device	IPhone XR
Affects part(s)	Motherboard
Needs equipment
Difficulty	◉◉◉◌ Hard
Type	Soldering

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Latest revision as of 08:23, 13 May 2025

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Problem description

Stuck in DFU mode

Flashes successfully with an update or restore but goes back to DFU mode.

Symptoms

Screen shows no image and pulls 0.45A via USB charging
Does not appear to boot
Prompt to boot on DCPS, shows it hangs around 45mA draw
Connect to PC and it's in DFU mode
Flash an update or restore & it goes through 100% with no errors but goes back to DFU mode

Solution

Check R0601 at the corner of NAND.
This resistor connects PP1V8_IO to SPI_AP_TO_S4E_MOSI_BOOT_CONFIG1
Clean the underfill around it & poke it hard.
If it breaks, it must be replaced.
Value is 4.7ohms
After replacing it, the phone will no longer be in DFU mode & boot right up.

Migrated from old wiki

@@ Line 2: / Line 2: @@
 |Device=IPhone XR
 |Affects parts=Motherboard
-|Type=Soldering, BGA
+|Type=Soldering
 |Difficulty=3. Hard
 }}
 {{stub}}
-[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
+== Problem description ==
+<!--
+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.
+ -->
+Stuck in DFU mode
+Flashes successfully with an update or restore but goes back to DFU mode.[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
 == Symptoms ==
 <!--
 Detail all measurable or observable symptoms in this section.
 -->
-* Not powering on
+* Screen shows no image and pulls 0.45A via USB charging
-* Not Charging
+* Does not appear to boot
-* Low amperage draw from DCPSU
+* Prompt to boot on DCPS, shows it hangs around 45mA draw
-* No short to ground on VDD Main, VDD Boost, or PP3V0_NAND
+* Connect to PC and it's in DFU mode
+* Flash an update or restore & it goes through 100% with no errors but goes back to DFU mode
 == Solution ==
@@ Line 22: / Line 32: @@
 -->
+* Check R0601 at the corner of NAND.
+* This resistor connects PP1V8_IO to SPI_AP_TO_S4E_MOSI_BOOT_CONFIG1
+* Clean the underfill around it & poke it hard.
+* If it breaks, it must be replaced.
+* Value is 4.7ohms
+* After replacing it, the phone will no longer be in DFU mode & boot right up.
-The charging IC that fails most commonly on this model is the Yangtze IC (U3300). This was the Tigris IC in previous models. It is under the bottom back shield. Use max heat, max air, largest nozzle to remove shield. It requires a lot of heat or tin snips to cut the shield. Be EXTREMELY careful not to float anything or knock off components. Be careful with how much force you use as too much force can flex the board and damage internal traces. The wireless charging IC (Iktara), baseband PMU, and baseband CPU all sit under this shield. Once the shield is removed, this chip is fairly easy to replace and usually fixes the problem.
 Migrated from old wiki