I got working an old sonny trinitron tv with a HDMI to AV box. I use it with openelec, and there is a good resolution.
Dear Nayma, we're happy for you. If you'd like to truly share your project results, consider to share them on udoo.hackster.io!
I would be very pleased to do so. I'm actually working with Kodi, a HDMI to 2AV convertor( for the old sony trinitron tv), a k400 wireless keyboard or ipad to controll it.
https://www.hackster.io/nayma/kodi-udoo-media-center-486680 Hi Andrea, here is the small project on hackster. on the other hand in the udoo download section http://www.udoo.org/downloads/ instead of kodi it says kobi.
Great job, man! I really appreciate how you start the project with such a capturing incipit: "I got given an old Sony Triniton by a good friend, that worked perfectly and I refused to throw it away" That's the truly spirit of DIY: you nailed it!