They've said that temporary line out errors can happen if the battery gets really low. Try fully charging it and see if the problem goes away.
As far as repairs, we don't really know yet. The new company has said that they will definitely not be offering repairs for iLiads, and that DR1000s would be on an individual basis (I'm assuming mostly depending on the available parts that they have). However, they did not mention anything about the DR800.
My guess would be that they will offer to repair it, but there will be a cost.