That's tough. Without a clear confirmation (either from Hisense or other verifiable way) it is hard to draw any parallels from what your seeing on your set to the H9G/Q9G. I'm not discouraging your posts (or data) but this is the H9G/Q9G owners thread.I did not ask about the identity of the models, I think that they will never directly confirm that the models are identical, because this is contrary to the policy of positioning Heisens in different markets. The only thing they confirmed was that there was a problem with the "red ghost" on the models for Europe and the USA. Thanks to your photos, I did a little Google investigation and found out that:
T-Con Board 65T55 C0K CTRL is sold as a replacement for models such as H9F (https://www.ebay.com/itm/Hisense-T-Con-Board-65T55-C0K-CTRL-for-TV-55H9F-65H9F- / 383328320149),
and also for the European model Q8600 (T-Con Board 65T55 C0K CTRL for TV Hisense 55Q8600UWG: продажа, цена в Киеве. запчасти для телевизоров и мониторов от "МАКСик Сервис" - 1261246310). Interestingly, the 2019 and 2020 models for different markets use the same T-Con boards.
At some point I recall someone saying that the ghosting was on the H9F but I never tried to confirm this or if it was a different/similar issue (I've spent enough time posting on the H9G thread). It would make sense that Hisense uses the same TCON board for multiple models and that could mean that the issue could propagate to multiple models, BUT that is pure speculation. What we need is clarity from Hisense or pictures of boards and serial numbers to confirm. I wish Hisense would share more information on the fix and how to identify the "right" boards from older ones. Till then they will be fueling the speculation machine on boards like ours.
Sorry for the long response. Appreciate your contribution. Hope you can figure out some way to confirm if your model is the same as the H9G.