Share your experience!
My phone is not charging, every time I plug in charging cable, it show sony logo then it say "Software Update Failed! Make sure your phone is connected to computer and try again" and again it repeat.. I have tried Xperia Companion software repair but it is also showing error. How to fix this?
Experiments.
Try the cable on another phone and try another cable on your own phone.
The USB connector on your device can be dirty or broken.
And when the Xperia Companion repair fails, then read this FAQ post.
Pay attention to 2B, 3 and 4.
I have tried all these but yet not fixed.
Then I advise you to goto the Support app or find Support in settings and contact your local support to send your device in for repair.