Sounds like a typical POS Genie Screw Drive. I love how they collect dirt and spit grease down the center of the outside of the garage door every time it operates. Damn greasy Genie!
Sounds like the motor is drawing more current. Can you at least open the door when the safety lanyard is pulled? If not, you have some resistance on the tracks or torsion bar springs not set right. Door should open with ease by hand. Also, check weight requirements.