Default Galaxy s2 just show samsung text!!

Hi, Someome can you help me.

My phone was broken after I install ROM S5 final version 2.9 (4.4.2 kitkat) in xda. Then when I on the phone its just show a SAMSUNG TEXT. Same S5 text logo. It wont turn on. Then I use ODIN to flash stock rom (Official 4.1.2 jellybean) but its stuck in NAND and ODIN just show DATASF and the process wont move.

I hope you can help me.

SII (GT-I910)