GPU gone for good?

I have an old ATI Radeon 9800 Pro which is quite broken.

When plugged in and turning on the computer, the card's fan gives a low constant growl (low RPM?) as if it was hitting something (which it isn't). Then I open my monitor to see my graphics getting teared and smeared in all directions (as if it was paper and gone through a slicer).

Otherwise the computer works fine.

So what has happened to my GPU? Is it just too old to work anymore or are there specific things which make this happen? Can it be fixed?

I'd like to plug the card to an old PC, saving some money for not buying a new card.

With AS5 you mean Arctic Silver or somesuch (came up with Google)?

Yeah, I could take it to an electronics store but I'd rather try something myself.

I'll check behind the heatsink whether stuffs are gone.

EDIT: Hmm, not sure what's okay for the pastes and such, but I didn't seem to have any (left?). Some random scrubs of cyan paste here and there, and some dust. I'll need to check the stores for some paste, AS5 maybe.