hi guys my friend bought a dm500 second hand , was working with a a pli jade image but channel list is outdated so i told him i'd put commando image on as it works well for my father...i cannot connect to box with serial cable and usb adapter which i know are working as i only done my fathers in January,it does connect with dcc and i have tried the one where u do it through browser but when i power off and switch back on holding in button on front it just boots up as normal,so i guess my question is can it be flashed any other way... presume serial port on box is goosed.