Hey @Idmcg !
Does your tablet completely switch off? If so, have you recently downloaded any apps, or has the tablet suffered from any physical or liquid damage? If it's the former, we'd like you to reboot your tablet in Safe Mode and monitor it, to see if switches off or not. If it doesn't, the problem is most likely being caused by a third party app, and so you'll need to remove the apps one by one.
You can enter Safe Mode by holding the Power button > Hold the Power off icon > Tap Safe Mode, and to exit, simply restart your tablet by holding the Power button > Restart. Please note, you won't be able to access most third party apps as these will be temporarily disabled, allowing your tablet to run on its most basic interface.
If your tablet has suffered liquid or physical damage, we would advise having this inspected: https://www.samsung.com/uk/support/repair/
