Not a Computer but a 43" Vizio television, the guide isn't matching the channels, input issues and now no picture

If I had to guess it's most likely 10 years old which what I looked up is about the average lifespan of this television.


Last week, the guide wasn't matching the channels at all so I unplugged the television and the Roku device. Rebooting has always worked before. The guide was on track until a few days ago so again I rebooted both the television and Roku.







Yesterday I had some sort of input issue and couldn't get the television to work at all. I unplugged it all and plugged it all back in again and it worked.


Today, there's sound but only a brief picture after rebooting. The picture lasts for about 5 minutes.


My expertise in electronics is once setting a VCR clock in 1996 without an instruction manual and rebooting devices, so I'm not really tech savvy.


I'm hoping this television is salvageable and hoping there's a lose cable or something simple.


If this television needs to be replaced, I'm looking for a decent 43" brand under $400.


Any helpful suggestion or insights are welcomed.