Why is my TLC Roku TV stuck on blue screen?

I had the same issue and thought it was time for a new TV. I'll list everything I did in the order I did it but honestly I don't know why it started working again. 

1. I cleared the Cache using the  remote shortcut found in this thread. I didn't know that it what the remote shortcut was doing until later so I did it several times. It results in the TV rebooting itself. 

Point the remote at the TV while it is on.

Press the HOME button 5 times, the UP button 1 time, the REWIND button 2 times, and the FAST FORWARD button 2 times. 

This will clear the cache and the TV will reboot twice.

I repeated this action probably four times. 

2.  hard boot by unplugging it. 

Simply unplug the TV from it's power source while it is on. 

Wait a few minutes and plug it back in.

3. Clear the cache again ( see step 1).

4. Unplugged the TV from the wall removed all USB, HDMI cars and  attached devices and left unplugged over night. 

Restarted with no devices attached.

5. Cleared cache agai, since I removed devices. (Step 1)

6. Unplugged the TV and pressed and held the power button on the TV, not the remote . Like resetting the bios battery on a PC.  I held the power button for a full 60 seconds. 

7.  I left it unplugged for two days. 

I tried the TV to see if it worked after each step. 

I had pretty much given up but I turned it on after two days and it came back like normal. 

I didn't know that all I was doing was clearing the cache using the remote, so maybe you can skip the repeated steps but it certainly can't hurt.

I have a TCL 55inch 4K Ultra  Roku TV it's nearly 5 years old and had last updated  in December 2021 ( less than the months).