Does the manual trim wheel move the stab, same as for the auto/powered system, or does it move something else (like rezeroing the feel system on the elevators)?
I can't conceive of how, following a stab runaway - which could be a failure right at the surface control - an alternate control scheme can regain control. If the drive has failed, it's failed. I can conceive of having a secondary control if it's say a trim switch failure, and you use an alternative command path.
If the stab is mechanically jammed, it's jammed. No alternate, secondary or manual control will move it.
IF it is the case of recentering the elevator feel, you can't recover aerodynamic trim authority - you're limited by elevator deflection and how much stab that can counter. So the flap config would be significant.