Device is not charging

I had a problem with this tablet either charging extremely slowly or just not at all.

I have tried multiple charger which all charge my Samsung Note 4 without a problem.

I have now replaced the battery and charging port but I am still having the same issue.

If I plug it in while turned off I get the charging screen, it shows 1% but does not go past this, I can turn it on and it will say it is charging but will not go past 1%. Occasionally when it is turned on there is a red cross over the battery, this does not always appear.

I would greatly appreciate any new suggestions.

thanks