for WEE SHELLY...I finally got mine to operate again...
only thing I can do is tell you what I tried...but...be careful...underneath there is a spring loaded rachet that locks the chair in position there is a black piece of metal that rests on the gear...gently preferredly...
(I used a small ball pean hammer) tap the metal strip forward to release it from the gear...if the chair now gets you back to normal great!!! note: I think that the black piece of metal will go back to the gear on its own
if not merely lift the black piece of metal up & it will go into place (I nipped my finger so I suggest using any thing like a screw driver instead) I had to do this more than 1x before it worked for me...good luck for you...
tom a. lee
December 2008