@ersanpermana Thank you very much but I did all what you said but I got the same result. More idea pls. PS. I got warning text during u-boot-update-bootmenu Previously, after failed to boot KP51 via uboot I over write uboot flasher with KP51 and tried as @ersanpermana posted with 3 zImage Omap1 KP51 KP48 ln -s KP51 as default kernel but Omap1 loaded instead KP51