Old LG tv screen flickers on and off when trying to power the tv off

Hello!

**the tv I have is not the one noted on this post, the website is just making me pick one to post. Actual model number is 42LG50***

My old ~10 year old LG flatscreen has started to have a problem after so many years and two moves. Whenever I go to turn it on or turn it off it will either take a long time to turn fully on or off (screen flickers on and off for a good 5+ minutes). But the rest of the time it works perfectly! The tv for some reason just doesn’t want to turn on or off correctly. Sometimes when I turn it off it looks like it off but one minute later it’ll turn itself on again. I don’t know if this is the age of the tv or the fact that it’s moved a lot in the past couple of years or maybe even the fact that I have a chrome cast connected to it.

Has anyone else experienced this?