eli5 How does hitting a tv that has been damaged fix the screen?



I’ve seen a lot of videos of tv’s with vertical lines or have been damaged being fixed by hitting it in the right spot. How does this work?

In: Technology

This worked better back in the days of analog TV and tubes. Over time corrosion would build up on the contacts. Hitting the TV would shake it enough to knock some of the corrosion off, giving a better contact and fixing the problem. This is the same effect of hitting your TV remote to get it to work. In that case, the corrosion is on the battery contacts.