It's hard for me to say what the other technician seen when he was there. Maybe he seen a bad spring, but a bad spring will not make the motor not run during the spin cycle.
I have only seen them springs brake a couple times on the stacker units like yours. The ones I have seen go bad make the tub lean to the side. The washer would still spin with a bad spring, but the tub would bang against the washer cabinet as it ran in the spin cycle.