When you removed the lines to blow through, did you remove the lines at the pump end and the cylinder end? If you just removed them at the pump end your air would be trying to extend or retract the cylinder, which isn't going to work. Either way that would not explain why both the bedroom and living room slides are inop. I would expect the problem to be related (not two separate things gone wrong).
Since you are familiar with, and have access to, the HWH pump and solenoids, you could try swapping the drivers side hoses with the passenger side hoses (on the HWH manifold), then run the pass switch and see if the drivers side room moves. That would eliminate the hoses and cylinders from your troubleshooting. If it moves, the problem is in the electrical or solenoids, if it doesn't move then you confirmed that the issue is in the hoses or cylinder.
Does your drivers side front slide setup look like this?