Chosen Solution
After a power surge/outage with my phone plugged in it now cannot charge. Instead it flashes the charge indicator perpetually while draining the battery fast (all the way in under 1 minute) when plugged, can charge it wirelessly.
Hi @mook2420 If you have a DMM (digital multimeter) here’s some images from the service manual for the phone that shows the charging troublshooting flowchart and also where the components mentioned in the flowchart are located on the boards.
(click on images to enlarge) Since wireless charging is OK (presumably the battery is not draining when charging this way?), this indicates that U7003 is also OK as it is used for both normal and wireless charging as seen in this flowchart for wireless charging troubleshooting, so you shouldn’t have to check it.
(click on image) Hopefully a start
@Gigin Ginanjar Here’s the charging troubleshooting flowcharts with the board layouts for the S21 Ultra that may help. They are the same as I posted above. You will have to work through the flowchart and see if all the voltage checks correspond to what the flowchart shows
(click on images)
