Generally a blown fuse is an indication that something is wrong and needs to be fixed.
If it is happening while the unit is in use, it may indicate power leakage to earth, which could be a safety hazard.
Or it could be drawing too much current because of a circuit fault.
If it happens when the unit is first switched on it could be be because of the initial power surge.

All three conditions could be contributing to some extent.

It should probably be checked out by an electronics technician.

If it only ever blows the fuse on switch on, fitting a slow blow fuse could keep it in service, and may appear to solve the problem, but i would still consider having it checked out and a component fitted to limit the initial current surge, as was fitted in most cathode ray tube computer monitors.