View source for Poco X3 Pro No Light After 2 SecondS Of Powering ON

{{Repair Guide
|Device=Poco X3 Pro
|Affects parts=Logic Board
|Needs equipment=Soldering Iron, Hot Air Station, Microscope
|Type=Soldering, Teardown, BGA
|Difficulty=4. Specialist
}}
{{stub}}

== Problem description ==
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When you turn on the device you will see the "POCO" booting logo for the first 1-2 seconds and after that the screen goes black
== Symptoms ==
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Detail all measurable or observable symptoms in this section. 
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* When the device is booted shows "POCO" logo and after 1-2 seconds screen goes blank
[[File:Full light.png|center|thumb|Light on]]
* Graphics are still hardly visible (with external source of light) 
[[File:Low light.png|center|thumb|No Light, only graphics]]
* Light section turns off
* Phone boots up normally
* High Diode value on the Display_CABC, the diode value on this should be ~ 0.610v
[[File:CABC DISPLAY.png|center|thumb|CABC DISPLAY]]


If you have all the symptoms mentioned above then proceed to the repair steps.

== Solution ==
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This problem occurs due to a missing CABC(pwm) line, this controls the brightness supplied to the display panel. Usually this track gets damaged from inside so the best way to repair it is to make a jumper from under the power ic to the display connector.

* Make sure the Diode Value on this pin is High or OL

* Remove the Power IC

[[File:PMIC.png|center|thumb|PMIC]]

* Take a jumper from under the pmic (exact pad shown in the picture) and make a jumper to the display connector (exact pad shown in the picture)

[[File:CABC UNDER PMIC.png|center|thumb|CABC UNDER PMIC]]
[[File:CABC DISPLAY.png|center|thumb|CABC DISPLAY]]

* Reinstall the power ic and test.