Replaced battery but no have red screen

[lraclrac]

Samsung GalaxY GT-P5210
Have replaced battery, re-assembled but now have red screen under charge. What’s gone wrong?
Thanks

 

[B. Diddy]

Welcome to Android Central! I moved this from the S3 forum to the Tab 3 forum.

Did you do the replacement yourself, or did a repair shop do it? What do you mean a red screen under charge? Is the battery not charging properly?