Repair Sony DAT Walkman? (by 6 users)

Some time back, my TCD-D8 unit's servo mechanism that's used to open the cassette slot stopped functioning. There may even be a DAT inside currently, but it's not simply stuck, as flipping the "open" switch no longer activates the servo. Power to the unit IS good.

Recently, while the unit has been sitting idle, but plugged-into its power source (been that way for over a year!), the servo mechanism started making intermittent sounds, of its own volition and a second or so duration. Obviously, something has gone brain-dead in the logic.

Sony, according to their web-based support site, no longer even repairs this item! I've looked around... is there someone who can, that you might know of, and would the cost be worth it? Thanks to anyone who may be able to help, here.