it depends on the camera model, J or G will be higher resolution than the L but all the saved images will be better than the transmitted image, either way it will be saved on the card if you dont clear it .
pull the batteries and external power, let screen die, power up , do a reset in tests , then reset link settings and see if you can get a link level, also change out the sd card if these steps dont work
this is a new L series? its very rare to not get a link level if firmwares match , you can pm me and ill get you my number to walk thru the settings and make sure you arent missing something , but you will need the camera and another one set as the home to test it . otherwise i think you will need to send it back