A tecnician found no faults a couple years back.
Well I have no idea what the problem is but...
You might want to get the deck checked out again.
2 yrs. was along time ago. During the last 2 years I've had multiple DAT decks take a shit.
If the heads are bad, it'll prolly be cheaper to just buy a used deck out of the yard sale
that has a clean bill of health.