I recently had a leak on one of my hydraulic cylinders the machine set for about 3 months I had a shop fix the cylinder for me I installed the new cylinder in that time the batteries had died so I charge them up started the machine and I was able to operate the boom in the arm in the bucket without any problem I lifted the lever to get out of the machine when I got back in I push the lever back down and now I do not have any hydraulic control to the boom. I do have control for the tracks and for the blade. But nothing to either stick. Any info would help.
Push down hard on the lock out lever and see if things work until you let up on it.