7 Jan 2016, 20:50

"Hi, 1 is undervoltage, change the power supply, you need a high quality 5v 2A"

Oh... I hope I damaged nothing. My first test was on my old first pi. The pi2 was only used 1 hour (mostly the installation). Thanks for the fast answer. Like I said, I changed the core via the menu. I will try the recalbox.conf!