After searching in the net, i found the way to make u-boot and how to install it. But i encounter some problem After copy u-boot.img, MLO, and boot.scr in the first partition of my SDCard. The site said that it the u-boot should be booting my uimage. But in reality my Pandaboard is not responding (as if there are no SDCard inserted) I follow the instructions from elinux.org ( http://elinux.org/Panda_How_to_MLO_%26_u-boot) and other source that give same instructions like elinux.org Can you tell me what i'm doing wrong ? Thank you for the answer, I am really appreciate any help and answer