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Can not boot from SD card of DM8168 EVM

hi, guys!

 I start my work follow the "DM816x/C6A816x/AM389x Evaluation Module Quick Start Guide", and the result is there is no video output through HDMI,

what is the problem? the follow pictures is the sw3 and sw4 of EVM board,

     

 

and there following context in the uart output 

"

2772.uart output.txtEXT3-fs: barriers not enabled Configuring netwkjournald starting. Commit interval 5 seconds ork interfaces..EXT3-fs (mmcblk0p3): . warning: maximal mount count reached, running e2fsck is recommended EXT3-fs (mmcblk0p3): using internal journal EXT3-fs (mmcblk0p3): recovery complete EXT3-fs (mmcblk0p3): mounted filesystem with writeback data mode No state is present for card EVM Found hardware: "" "" "" "" "" Hardware is initialized using a generic method ifup: can't open '/var/run/ifstate': No such file or directory done. No state is present for card EVM Setting up IP spoofing protection: rp_filter. hwclock: can't open '/dev/misc/rtc': No such file or directory Wed Jun 1 15:06:00 UTC 2011 hwclock: can't open '/dev/misc/rtc': No such file or directory SysLink version : 02.00.00.68_beta1 SysLink module created on Date:Jun 1 2011 Time:12:56:17 Entered KnlUtilsDrv_initializeModule traceMask value: 0x0 Leaving KnlUtilsDrv_initializeModule 0x0 NET: Registered protocol family 10 Unhandled fault: Precise External Abort on

"

 

the whole output context of uart is in the file "uart output.txt"

Can anyone tell me what's the problem is ?

Thank you!