Thank you very much @arizanotu, this brought the TV back to life. Connecting a source to the scart, I have picture and sound again. Unfortunately, the TV tuner doesn't work at all, it scans for channels but doesn't find anything. The truth is, I was expecting to have more trouble with the panel rather than the tv tuner. I am grateful to you for your kind help.
Dodano po 17 [minuty]:
Is there a way to find a version of the firmware for my SUT-RE216TN (EB1E12) tv tuner. Everything else on the firmware kindly provided by @arizanotu works great. I have an original copy of the spi eeprom extracted with an eeprom reader after the TV died but I don't know how this may help since it was probably corrupted to begin with.
Tried both the firmware files you provided. Same result as the one in your first post, everything works but not the TV-tuner. For your information, on all three of your firmwares, if you enter service mode and go to tuner settings, you see that they expect the LG18273 TV-tuner which of course is not what I have.
Also, the page concerning the TV-tuner, is read-only and doesn't allow any modifications to the tuner model.
I tried another thing, I substituted mboot.bin with my original one captured with an eeprom reader after the TV died. Same behavior, nothing changed, still the same LG18273 TV-tuner is shown on tuner settings.
How do I change the TV-tuner model? There has to be a way!
I finally managed to find a firmware that made my TV work!
After studying the specs of various TVs, I managed to find two sets from Toshiba that were more or less what I needed. Unfortunately, the panel wasn't exactly the same so I had color problems.
Then I found Hitachi 22H8L03 which has the same hardware. I managed to source the firmware from an Italian forum. I installed it in my TV and now I have almost all functionality back. I say almost because that TV only has one HDMI port whereas mine has two, but that is the only difference.
I wish I knew how to activate the second HDMI port as it is a read-only option in the service menu, but that is the subject for a different topic. I'm sure I could manage to find a compatible TV that even has the second HDMI installed but I don't want to search anymore, I'm tired!
I would like to thank everyone who showed interest in helping me towards the right direction.
For completion, here is a Link to the file that worked for me. All you need to know is that it is for:
* 17MB62-1 mainboard
* LG LC215EUE panel
* SONY compatible tuner