View source for Samsung Galaxy A13 5G(A137) Not Charging

{{Repair Guide
|Device=Galaxy A13 5G
|Affects parts=Logic Board
|Needs equipment=Soldering Iron, Hot Air Station, Microscope
|Type=Soldering, BGA
|Difficulty=4. Specialist
}}
{{stub}}
== Problem description ==
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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.
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You have a phone that does not charge but it works with charged battery. It could have happened due to faulty charger/short on cable or something similar. 

== Symptoms ==
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Detail all measurable or observable symptoms in this section. 
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* Phone does not charge at all
* No charging logo on top(near battery)
* Does not connect to PC
* Burned charging port
* Customer said happened with bad charger/usb cable

=== Diagnostic Steps ===
This is how to diagnose and repair the no charging fault:

* Check if these diode values on fpc are ok.

[[File:DP DM on conn.png|center|thumb|Required for Charging]]

* ALL OF THE VOLTAGE CHECKINGS BELOW SHOULD BE DONE ONLY BY INSERTING A CHARGER AND NOT A BATTERY. IF YOU WANT TO CHECK GR SHOULD BE WITHOUT ANY SOURCE OF POWER(CHARGER OR BATTERY)

[[File:Ic's to check.png|center|thumb|ic's to check]]
[[File:IC and Diode value.png|center|thumb|IC's and Diode value]]

* Check for 5v input in the VBUS IN capacitor:
** if ok then check check on VBUS IF FL(bypassable coil):
*** If voltage is ok then skip the next step
* If no voltage in  VBUS IF FL then you most likely have a fused OverVoltage Pritection ic. There are 2 ways to fix it. 
*# Change the OVP IC with a similar one.
*# You can bypass it but by bypassing it you will have higher risk to damage a chaging ic in future because of faulty chargers/cables.
*#* Bypass the OVP IC: remove the OVP IC and make the same exact jumper(short VBUS IN to VBUS IF) shown in the picture below
*#* [[File:Removed ovp ic.jpg|center|thumb|removed ovp ic]]

[[File:Bypassed OVP IC.jpg|center|thumb|Bypassed OVP IC]]

* Check for Voltage on VPH COIL(3.7-4.2v) Should have stable voltage and no fluctuation.
** If voltage is not stable then check GR of VPH COIL, if okay then the problem could be the charging ic(replace charging ic)
* Check for GR and voltage on BOOTCAP
** Should have 3.7-4.2v in one side and the other side should have almost the double voltage of it
** if it doesn't then you could have a faulty bootcap or faulty charging ic. 
** Check for faulty BOOTCAP: probe both sides of bootcap and check for short, if does not show low gr then its considred ok. 
** '''<u>Note:</u>''' If you have a faulty bootcap then the problem you will most likely face is fake charging.
** Your problem should be solved by replacing charging ic.<br />