IDD CI24 ECONO MM Penta 1.20 Galaxy II 1.2Mtr Polar MTG yes it has been on the arc for 25 years and is now fixed on 13 East using two pairs of rusty molegrips. Unlike me they never groan but always perform.
As much as we would all like to be able to, on this forum (with the exception of one or two people) non of us can perform miracles.... diagnostic or otherwise. It would help to have details of how old the receiver is what firmware it has whether this is official or unofficial firmware what satellite you are receiving how does the freeze manifest itself. More information is required.