Toyota Repair: 93 toyota Camry AC vent blows lightly, control levers, toyota camry

Question
I have a 1993 Toyota Camry. When I turn on my air conditioner or heater, (and I can have the knob turned to the max) I can only feel light air coming out of the 2 side vents on the right and left, far ends of the dash board. There is no air coming out of the 2 middle vents. However, I can hear the vent blowing hard. I just don't feel the air. What can I check to fix this? p.s. The vents worked perfectly 2 years ago and just stopped suddenly.

Answer
Check the control cables attached to the air ducting on both sides under the dash, one of the cables has probably come off one of the control levers or a cable is broken, check the cables while moving the knob that controls the direction of the air flow.