Question edited for clarity.
This is generic help because you don't state the model. You have to do Link Setup first, then the options should become active.
It may well play NTSC disks but it won't convert the standard to PAL or whatever your system is. Check your TV will display NTSC 525line pictures with 30HZ frame rate.
Here is one for spares, or use this one and use yours for spares. It will keep you going for another 30 years.
https://www.ebay.com/itm/265132715481
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I would guess it is either overheating, or someone has a Samsung next door and your remotes are the same. :>/
For overheating, go around the back and side vents with a vacuum cleaner with the small brush attachment on it.