Hi @ramses2 ,
Check the firmware version of the player. Then see if there is a firmware update available for your player. Follow the advice in the link about selecting Samsung's support service for"your" country, as the firmware may vary from location to location for the same model.
Sometimes a firmware update (or even reinstalling the same version - although not sure if Samsung will do this) can fix the problem by effectively resetting any possibly corrupted setting.
Just a thought.
Hi @ramses2 ,
I'm leaning away from a bad Blu Ray disc drive only on the basis that it still plays DVDs OK.
Also as I stated earlier, this is an easier first step to try to fix it. If it doesn't at least you know that it is not a software problem. (firmware just means that the operational software used by the player to function is fixed and can only be altered by installing new software in a manner allowed for by the maker, unless it becomes corrupted of course ;-)
Here is the link to the firmware for your player. You'll notice that this download version is dated 12/12/2017 which makes you wonder what "improvements" had to be made for a player released in 2015. Usually it is to overcome issues found out by users.
It is rather a large download at 143.47Mb so if you have a limited data download allowance from your internet provider be aware of this.
Unfortunately Samsung has made it so that the link I posted doesn't go directly to the download page for your player, so you'll have to navigate through the menu options.
Here are the steps:
Select TVs & Home Theater > Home Theater > Blu Ray + DVD Players click on Player Type and select Blu Ray, click on Series and scroll down, find and select J5100 Series (ensure that it is J5100 and not just 5100 series as this is not the one for your player) and click Confirm. Next click on Download in the Firmware box. Once you have downloaded it follow the instructions in the firmware instructions.