Dear Samsung Member,
Greetings from Samsung Customer Support!
To resolve "display" issue kindly follow the given below step:
>> Reset the device: settings >General Management > Tap on Reset.
Note: Before reset make sure to have back up of the data via Smart Switch Mobile App
(Install Smart Switch App > Open > Click on Memory Card Icon >Back Up option > Choose the data for Back up > Back Up).
To resolve "battery drainage" kindly follow the given link: http://www.samsung.com/in/support/skp/faq/1101689
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report) along with the Video or Screen-shots. This will help us to further investigate and resolve your concern.
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
Thank you for writing to Samsung.
Samsung Customer Support