Issue with Mitsubishi MMCS DAB Station List

good evening,

i have a problem with this navigator. it can no longer update the DAB station list, which are not deleted even after a factory reset. i notice that, from the service menu, the item "acquisition error" appears on HD microcomputer. could that be it? it had been losing the stored stations for some time, jumping to the first station in the list. the other functions are ok.

firmware updated to the latest release, even though it is from 2020.

ideas?