Unit blows fuses

My unit just sitting there playing a movie stopped and ejected the movie and shut off and would not turn on again.
I tryed DC power but nothing.

I pulled the back cover and found the 4 amp fuse blown.
I replaced it and it blew as soon as I plugged it into AC.
I checked the fuse on the DC cord and it was blown.

I dont know if it's worth repairing? I bought it 3 years ago so I would assume the warrenty has run out.

Anyone need spare parts?

Thanks

Trent