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For the actual situation, and in answer to the OP's question, the comment from
@dub_nerd above nails it.
Which is what I said in my first post, re. The tuner.
And it far from answers the OP's question as we do not know if a tuner is present. What is a "screen" ?
We all know that if a device with a screen has a tuner, whether working or not, then a TV license is required. That is not in question.
When I said the "waters are muddied" I was referring to, where devices other than, lets call them "standard TVs" were being employed to display transmitted/broadcast images.
To that end I quoted two Irish advice sites , citizensinformation.ie and gov.ie which are at total variance.
You stated gov.ie is wrong and indeed maybe they are, I don't know, but to anybody looking for advice it certainly does not help to have two opposing answers to what should be a simple quest.
The Broadcasting Act is being constantly reviewed and updated (last AFAIK 2017) to try to encompass the ever changing technology and whether it requires a license or not.
Just to give a short scenario, I know this is anecdotal to posters but I know it to be fact. A friend of mine a few years ago used to store his TV in his parents house over the Summer months just to try to encourage his kids to go out or read etc. What really bugged him was that his TV license expired in May but when he would go to renew it in September he had to "back date" it even though he did not have a TV at his premises. When he would try to argue this he would be told, along the lines of "Hard luck, but that's the process..." So even though he wasn't in possession of a TV he was forced to pay for a licence.
He also went looking for a definitive answer to the fact that while he stored his TV in his parents house he had his VCR in his own house, which obviously has a tuner, is he required to hold a valid Tv license? It depended who he got on the phone as to whether it was required or not but nobody was willing to send him confirmation via a letter of their answer, fobbing him off with " I'll check this out and get back to you" and suchlike.
For Gods sake there have been posts here, in the past, where people have been "hounded" by TV Inspectors for just having an antenna on their house and not in possession of a TV !
It is far from simple, once you stray away from the standard and to that end I stand by comment that the waters are indeed very muddy.