Question about a DVR?

could be your laser optical reader..You say you have used the same discs you used in the past??..Heres what I do..Open the darn thing up..Its broke already,right..what are you gonna do..make it worse??..Open, look where the laser reader is, see if there is a set screw to adjust and tweak it a bit..could be out of line..has worked countless times for me in the field.