Hello Eliezer Fernandez ,
1. Please compare switch settings between these two boards.
2. Please download image ISO for e6500 from Linux® SDK for QorIQ Processors|NXP, get SD u-boot image to copy it in the first partition of a SD card. Plugin SD card to the target board and configure the target boot from SD.
3. Do you have CodeWarrior TAP? If so, please download CodeWarrior 10.5 to debug the target board to find the exact problem.
Thanks,
Yiping