No it won't be a software issue. If it worked before, it should work the next day without needing software. It has failed and needs repairing.
This is typical of reviews
Is Konka a good TV brand?
TV is complete garbage with no product support or updates of any kind, even security updates after over almost 2 years, had an issue with the TV and was unable to even get support from Konka,
I'd advise to avoid this brand at all costs, looked great to start, but after having it for a while and seeing issues with the ...
Blank screen issues
https://www.google.com/search?q=KONKA+49+inch+TV+blank+screen
..
Tried that it has no turn off feature
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