Hi, did you ever get to the bottom of your problem with the TFT not coming on. Three days ago I had a similar problem with my 2021 Rocket 3 GT Triple Black. I had parked at a hotel and when I cam out in the morning I went through the usual routine of turning the smart key fob on and then pressing the start button. The electronic steering lock released, the front day running light and tail light came on, but nothing else. The TFT display did not light up, the fuel pump didn't start and none of the other switches on the handlebars would work, (I thought the hazard warning lights would be able to work under any circumstances but no.). I checked the battery terminals and called out the breakdown service, (RAC in the UK is partnered with Triumph). The guy checked all the fuses and then looked up his database. He told me they had a technical note from Triumph saying the right hand switch cluster containing the starter switch had been reported as causing issues. However, he wasn't able to do anything to help me due to warranty issues. I then had to wait on a recovery truck to take me and the bike 350 miles back home. (I will come back to this point at the end as there is a lesson to be learned for UK readers regarding recovery services).
I called Triumph and my bike was picked up today and returned to the dealer for investigation.
Another point to make. I have the Triumph Track + tracker installed. This began to send me the wrong location of the bike approximately 2 weeks ago. I contacted Scorpion/Datatool, the manufacturer, and they are going to repair/replace it. They assured me it would not interfere with the operation of the bike. Five days ago I began to get spurious warnings and text messages from the tracker, one telling me the bike was being tampered with and it was in a city 500 miles away.
Back to the breakdown, I called Triumph Aftersales once my bike and I were in the recovery vehicle and on the move. They also assured me that the failure of the bike to boot up has nothing to do with a faulty tracker.
I have had opinions from Triumph which suggest the immobiliser has failed. I have also been told by Datatool that the Triumph Tracker + will be replaced. Yet neither of the two companies think these failures can be linked?
So for now I will have to wait until the dealer has carried out further investigation. I will keep you informed.
For the UK readers. The lesson learned regarding vehicle recovery companies is choose very carefully. I only used the RAC because I had been given one years free membership by Triumph. (I do have other recovery cover through my insurance company). It took the RAC 40 hours to get the bike and myself 350 miles back home. This included one night in a hotel. The relay method and procedures they use do not permit a direct recovery home from a breakdown unless you are in a radius of approximately 30 miles. It isn't good.
I know the above is a bit long and I apologise. I do hope there are or will be some learnings from it.