That meens that ML bus have Adress conflicts, but first press go in servicemenu there you see errorcodes and then go in monitor again if ML CI is still there ,pull out Masterlink cable and press go in monitor menu again, if it still there you have the fail inside tv set,and in most cases ML interface IC is failing (do to lightning or other power failure)
if error gone, you have to disconnect all linkproducts and connect one by one to see wich is fail and sometimes it works then you have connect all tlinkproducts again
Regards
Tomas