[Q] Won't boot after MobileOdin flashed Baseband topic

Hi,

I just tried to flash the baseband "I9505XXUGNG2-MODEM" with MobilOdin to the S4 (i9505) with installed CyanogenMod 11 (last nightly). After reboot the phone displays the Samsung S4 logo and after this a black screen with a fast flashing very smal pink triangle in the center of the screen which moves from left to right and start over.

What is this and how can i get the phone to work again?

Thanks