If the screen isn’t broken it can actually be cost effective to replace a TV.
About a year ago I had a small(er) LCD (42") that I kept in a guest bedroom that broke about 6 months prior (when I had it wall mounted in my home office.) At the time I just bought a new (larger one) for cheaper (I bought the 42" fairly early on so it was extremely expensive at the time.) Anyway, I really wanted a TV in my office immediately so I put zero effort into diagnosing what was wrong with the other TV and just bought a new one.
However, when I got around to look into it it seemed the issue was most likely the capacitors on the TV main board (a common failing in my model Samsung TV.) This problem manifested in the TV basically not being able to turn on.
I called a local TV repair shop and they said it’d be around $85 to repair, so I took it in, they ended up charging me $76 after tax and etc. I had bought the TV new for like $1800, and 42" LCDs were far cheaper when I had it repaired (I think they were in the $600 range at the time), but a $76 fix is still a lot cheaper than $600 for a new similar sized TV. Even a new TV with better features is still not as much value for money as getting a working TV for $76.
No idea what the issue is with yours, but what you could always do is buy a new TV and repair the current one. If you’re already interested in buying a new TV the cost of repairing it and getting two TVs might only be $80-100 more.