Searching for the software (typically a .rar file for USB updates) often leads to technical forums or specialized archives. This specific model is a non-Android, simple LED TV with a 1366 x 768 resolution.
For professional-grade firmware files like the 32U561.rar , you can check the following technician-recommended platforms:
Once you have downloaded the .rar file, follow these steps to update your TV:
Press and hold the button on the TV panel (not the remote). Plug the power cord back in while holding the button.