If it boots up , and has the normal menu, Power up the DS708, select Setup /Help, select About. You should be able to see and write down all information , System Program Version , Firmware version , Hardware Version , Product Serial Number, and Register Password.
You need to at least have the product serial number and the register password to have support check whether unit still is within the unit's one year warranty and free update period.
You can also put the SD card in the card reader of your PC , right click on it, and check Properties, I believe any SD card needs to be formatted in FAT32 to work correctly in DS708