HP ScanJet 8250 Incongruence

At location A I use SJ4850. At location B I use SJ8250. I use the same
laptop (HP Pavilion dv9000) at both locations. This system has worked
well in the past. I’m now at location B. Suppose I scan a fully
printed A4 sheet. I see an A4 image, but the printed sheet has been
“pushed” to the right and upwards, lopping part of it off, while
leaving corresponding blank space at the left and the bottom.

Have tried reinstalling the HP drivers to no effect. The defect seems
to be at the HP end as four different software scanning programs give
the same result.

Is there a way of regaining congruence? Is SJ8250 dying?