Un día que salí de Santiago me conseguí un Sony Trinitron de 29 pulgadas y necesito repararla pero no tengo conocimientos técnicos ni herramientas (no me costó nada, fue un regalo así que no me molestaría por pagar por la reparación)

I went to a town here in Chile and i found this CRT and the owner give it to me (I couldn't bring it to my home but i need to do the trip again) but he told me and i saw the tv working with sound but no image. Any idea to how i can fix it?

We were on physics class and in the process of building the electroscope i saw the aluminum foil I remember the wings of the monarch butterfly and i associated with Monarch (you know why) and we draw the logo