@ian57 The difference is that in the first one, I plug the Pi on a Samsung TV 4K, wait until I see the UI, and then connect the Pi to the TV 24"

weird. That's the stage:

• It works: Burn with Balena, eject (not modifying config.txt) and plug/connect the Pi on a Samsung TV 4K. Now I wait 5-10 min. to prepare partitions, power off and connect again the Pi on the TV 24" (resolution is 1080p by default). Everything is fine.
• It doesn't work: Burn with Balena, eject (not modifying config.txt) and connect on a Samsung 24" (model UE24H4003AW) and I get infinite loop.

I let this comment for future reference or maybe can help someone.

Tested on a 4K Samsung TV and it works. Thanks.

@davidb2111 default config.txt. TV Samsung UE24H4003AW support up to 1080p.

@acris official charger. Are you saying the microSD quality is the issue about continuously reboot?. First time I hear that in 8 years with a Pi. Tested 2 of them (Samsung Evo) with the same result.

eeeprom: 3 sep.
SD: tested on 256Gb Samsung and 8 GB Trascend.

When power on, show this message and then restart in an infinite loop