"Line on screen after LCD replacement"に関する回答I think you need to try reconnecting the display to the phone. True, for this you will need answers and little experience in repairing such devices. Although it seems to me that it’s best for you to turn to the master who replaced the screen for you.
"Apple watch not charging after battery replacement"に関する回答If you use a third-party charging stand, take the charging cable that came with the Apple Watch. If you cannot charge the Apple Watch or a message appears stating that charging with this accessory is not supported, follow these steps. Make sure that the Apple Watch magnetic-charging cable is fully inserted into the USB power adapter, then check that the adapter is fully inserted into the power outlet. Make sure you are using the magnetic charging cable and the USB power adapter that came with your Apple Watch. Remove the plastic film completely on both sides of the charger. Make sure that the back of the Apple Watch and the charger are clean. Put the Apple Watch back on the charger. The charger magnets will align the Apple Watch, and a green lightning bolt icon will appear on the screen. If the Apple Watch still does not charge, force a restart. Press and hold the side button and Digital Crown for at least 10 seconds until the Apple logo appears. Try a different magnetic watch Apple Watch charging cable...