if you have null RS232 cable connect one end to the box and other the port in pc
open eromupdate from the above give file
port setting select the port of the pc which yo have connected null rs2232 cable
biterate set 115200
parity set even
operate mode : upgrade
file : browse the firmware for orton x403p
and also include tick in boot loader
now at this time the stb should be off
now press next at the same time after 3 to 4 sec power on the stb if at that time if it is connected then it will say connected , if not they again repeat the process power off the stb
and press next ....
then when connect it will take time about2 to 3 miniutes to load firware and it will ask for flash the box just flash it
do not power off the stb while flash after completing flashing the stb will reboot and connect and enjoy...