Step by step

My smart TV is lagging or glitching: the fixes that work

Slow menus, apps crashing, screen freezing: before calling customer service, a few simple steps solve the vast majority of problems. The most effective one takes ten seconds.

By Clément, TV specialist at Nimestore · 2 min read · Published 26 October 2026
In brief
  • The full restart fixes most slowdowns
  • Delete the unnecessary apps and clear the cache
  • Install the updates system and app updates
  • As a last resort: the factory reset

Why your TV slows down

When you switch it off with the remote, most smart TVs don't really turn off: they go into standby so they can start up faster. Over the weeks, memory fills up and apps pile up. The system eventually slows down, like a phone that's never been restarted.

The steps, from simplest to most drastic

  1. The full restart. Hold the power button on the remote until the TV restarts (about 5 seconds on many models), or unplug it from the socket for a minute. A proper restart clears the memory.
  2. Clearing out the apps. Delete the ones you don't use and, on Google TV, clear the cache of the heaviest ones (Settings › Apps).
  3. Updates. Check for a TV software update in Settings › Support or System, and for app updates.
  4. The connection. If only the apps are lagging, test your speed and move the box closer or switch to a wired network connection.
  5. The factory reset. If nothing else works, it restores the TV to how it was on day one. You'll then need to reinstall the channels and sign back in to your apps.
!
The habit to adopt

Unplug the TV for a minute once a month. This simple step prevents most slowdowns and bugs.

When should you worry?

If the TV restarts in a loop, if the picture cuts out while the sound carries on, or if the bugs return after a factory reset, it may be a hardware fault. Bring us your receipt: we'll check it and, if needed, arrange repair under warranty.

Frequently asked questions

Does a factory reset delete my channels?

Yes, it erases all settings, channels and accounts. Write down your login details beforehand.

Can an external box make an old TV faster?

Yes. If your TV is more than six or seven years old and its apps are no longer supported, a Google TV or Apple TV box can give it a new lease of life.

Should I switch the TV off at the socket every evening?

That's not necessary. An occasional proper restart is enough.

Need advice?

Come and compare the screens in person

At our Temploux shop, we switch on TVs side by side with your content. Or ask our expert salesperson online, right now.

Loading...
Back to top