Direct answer
Start with a cold boot, then check for a TV software update. If one app is affected, reinstall that app. Reset Smart Hub only after those steps fail because it signs you out of every app on the TV and requires the account credentials again.
What this covers
- Samsung Smart TVs, smart monitors and projectors with an app that freezes, crashes or will not load
- Tizen-based interfaces with Support and Apps menus
- One app or several Smart Hub apps
What it does not cover
- ×A provider-wide streaming outage
- ×TVs with no network connection at all
- ×Hardware failure, blank screen or power failure
Cold boot the TV
ReversibleWith the TV on, hold the remote’s Power button until the TV turns off and the Samsung logo appears again. If that method is unavailable, unplug the TV for about 30 seconds and reconnect it.
Install the latest TV software
ReversibleOpen Settings, choose Support, then Software Update and Update Now. The exact path can vary slightly by model year and region.
Reinstall the affected app
Signs you outOpen Apps, choose Settings, select the affected app and choose Reinstall. On interfaces that allow deletion, delete and reinstall it. Confirm you know the app login before proceeding.
Reset Smart Hub only as the last software step
Reset / data riskDepending on the model: Settings › Support › Device Care or Self Diagnosis › Reset Smart Hub. Enter the TV PIN when asked. The default is often 0000 unless it was changed.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
Why is only one Samsung TV app not working?+
When other apps and the internet connection work, the affected app’s stored data, session or current version is the more likely fault domain. Reinstall that app before resetting all of Smart Hub.
Does resetting Smart Hub delete TV settings?+
It resets Smart Hub and signs you out of the apps used on the TV. It is different from a full factory reset, but you should have the Samsung and app login details ready.
What if the Delete option is gray?+
Samsung’s support guidance says a recommended app may not offer Delete. Select Reinstall when that option is available.
Answer for the exact device and software version shown above.