If your TV is an LCD flat panel then you don't have much to worry about burn-in or image retention because LCDs use transmissive light sources unlike CRT, plasma and OLED which are emissive light sources and thus prone to image retention and even burn-in if paused for somewhat extensive periods of time, especially if the paused image is in high contrast.
LCD screens may suffer from burn-in if images are paused for weeks at a time especially if contrast is set high, OR if you are using your screen as computer monitor keeping the same superimposed image continuously onscreen set in high contrast, as used professionally in some circumstances.
As for image retention in LCD screens in most cases they can be remedied by using those LCD pixel optimizer programs that flash R/G/B colors very fast on/off to "unstuck" single LCD pixels that happened to get "stuck" either in the "ON" position (allowing light through) or on the "OFF" position (no light passing through).
LCD screens may suffer from burn-in if images are paused for weeks at a time especially if contrast is set high, OR if you are using your screen as computer monitor keeping the same superimposed image continuously onscreen set in high contrast, as used professionally in some circumstances.
As for image retention in LCD screens in most cases they can be remedied by using those LCD pixel optimizer programs that flash R/G/B colors very fast on/off to "unstuck" single LCD pixels that happened to get "stuck" either in the "ON" position (allowing light through) or on the "OFF" position (no light passing through).