Video problem with apalis evaluation board

Hi,
We purchased recently 3 nos. of Apalis T30 boards and 1 no. of Apalis Evaluation board.

During initial setup everything was fine and later during usage, some problem was happened and now there is no display output either from Unified connector or VGA.

I tried by setting, default environment variables, still problem not resolved.

Following is the output of PRINTENV from terminal software:

arch=arm
baudrate=115200
board=apalis_t30
board_name=apalis_t30
boot_a_script=load ${devtype} ${devnum}:${bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_extlinux=sysboot ${devtype} ${devnum}:${bootpart} any ${scriptaddr} ${prefix}extlinux/extlinux.conf
boot_file=uImage
boot_prefixes=/ /boot/
boot_script_dhcp=boot.scr.uimg
boot_scripts=boot.scr.uimg boot.scr
boot_targets=mmc1 mmc0 usb0 pxe dhcp 
bootcmd=run emmcboot; echo; echo emmcboot failed; run sdboot; echo; echo sdboot failed; run usbboot; echo; echo usbboot failed; run nfsboot; echo; echo nfsboot failed
bootcmd_dhcp=usb start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi
bootcmd_mmc0=setenv devnum 0; run mmc_boot
bootcmd_mmc1=setenv devnum 1; run mmc_boot
bootcmd_pxe=usb start; dhcp; if pxe get; then pxe boot; fi
bootcmd_usb0=setenv devnum 0; run usb_boot
bootdelay=1
console=ttyS0
cpu=armv7
defargs=core_edp_mv=1300 usb_high_speed=1
dfu_alt_info=apalis_t30.img raw 0x0 0x500 mmcpart 1; boot part 0 1 mmcpart 0; rootfs part 0 2 mmcpart 0; uImage fat 0 1 mmcpart 0; tegra30-apalis-eval.dtb fat 0 1 mmcpart 0
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
emmcargs=ip=off root=/dev/mmcblk0p2 rw,noatime rootfstype=ext3 rootwait
emmcboot=run setup; setenv bootargs ${defargs} ${emmcargs} ${setupargs} ${vidargs}; echo Booting from internal eMMC chip...; run emmcdtbload; load mmc 0:1 ${kernel_addr_r} ${boot_file} && bootm ${kernel_addr_r} - ${dtbparam}
emmcdtbload=setenv dtbparam; load mmc 0:1 ${fdt_addr_r} ${soc}-apalis-${fdt_board}.dtb && setenv dtbparam ${fdt_addr_r}
ethact=e1000#0
ethaddr=00:14:2d:29:b5:21
fdt_addr_r=0x82000000
fdt_board=eval
fdt_high=ffffffff
initrd_high=ffffffff
ipaddr=192.168.10.2
kernel_addr_r=0x81000000
loadaddr=0x80408000
memargs=vmalloc=128M mem=1012M@2048M fbmem=12M@3060M
mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi
netmask=255.255.255.0
nfsargs=ip=:::::eth0:on root=/dev/nfs rw netdevwait
nfsboot=run setup; setenv bootargs ${defargs} ${nfsargs} ${setupargs} ${vidargs}; echo Booting via DHCP/TFTP/NFS...; run nfsdtbload; dhcp ${kernel_addr_r} && bootm ${kernel_addr_r} - ${dtbparam}
nfsdtbload=setenv dtbparam; tftp ${fdt_addr_r} ${soc}-apalis-${fdt_board}.dtb && setenv dtbparam ${fdt_addr_r}
pxefile_addr_r=0x90100000
ramdisk_addr_r=0x82100000
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${bootpart} bootfstype; then run scan_dev_for_boot; fi; done
scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${bootpart} ${prefix}extlinux/extlinux.conf; then echo Found ${prefix}extlinux/extlinux.conf; run boot_extlinux; echo SCRIPT FAILED: continuing...; fi
scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${bootpart} ${prefix}${script}; then echo Found U-Boot script ${prefix}${script}; run boot_a_script; echo SCRIPT FAILED: continuing...; fi; done
scriptaddr=0x90000000
sdargs=ip=off root=/dev/mmcblk1p2 rw,noatime rootfstype=ext3 rootwait
sdboot=run setup; setenv bootargs ${defargs} ${sdargs} ${setupargs} ${vidargs}; echo Booting from SD card in 8bit slot...; run sddtbload; load mmc 1:1 ${kernel_addr_r} ${boot_file} && bootm ${kernel_addr_r} - ${dtbparam}
sddtbload=setenv dtbparam; load mmc 1:1 ${fdt_addr_r} ${soc}-apalis-${fdt_board}.dtb && setenv dtbparam ${fdt_addr_r}
serial#=02733345
serverip=192.168.10.1
setethupdate=tftpboot ${kernel_addr_r} flash_eth.img
setsdupdate=setenv interface mmc; setenv drive 1; mmc rescan; load ${interface} ${drive}:1 ${kernel_addr_r} flash_blk.img || setenv drive 2; mmc rescan; load ${interface} ${drive}:1 ${kernel_addr_r} flash_blk.img
setup=setenv setupargs igb_mac=${ethaddr} consoleblank=0 no_console_suspend=1 console=tty1 console=${console},${baudrate}n8 debug_uartport=lsport,0 ${memargs}
setupdate=run setsdupdate || run setusbupdate || run setethupdate; source ${kernel_addr_r}
setusbupdate=usb start && setenv interface usb; setenv drive 0; load ${interface} ${drive}:1 ${kernel_addr_r} flash_blk.img
soc=tegra30
stderr=serial
stdin=serial
stdout=serial
usb_boot=usb start; if usb dev ${devnum}; then setenv devtype usb; run scan_dev_for_boot_part; fi
usbargs=ip=off root=/dev/sda2 rw,noatime rootfstype=ext3 rootwait
usbboot=run setup; setenv bootargs ${defargs} ${setupargs} ${usbargs} ${vidargs}; echo Booting from USB stick...; usb start && run usbdtbload; load usb 0:1 ${kernel_addr_r} ${boot_file} && bootm ${kernel_addr_r} - ${dtbparam}
usbdtbload=setenv dtbparam; load usb 0:1 ${fdt_addr_r} ${soc}-apalis-${fdt_board}.dtb && setenv dtbparam ${fdt_addr_r}
vendor=toradex
ver=U-Boot 2015.04 (May 18 2015 - 15:12:53)
vidargs=video=tegrafb0:640x480-16@60 fbcon=map:1

Can you provide output form boot?

Please have a look at my answer of the following question.