Garage door will not open from Ryobi opener, but opens easily by hand when disconnected.

Safety first: Disconnect power before adjusting the drive system. Keep hands clear of the rail when testing.

• 1. Disengage and test door: Pull the emergency release and manually open the door. If it moves smoothly, the problem is in the opener drive, not the door.
• 2. Inspect belt/chain: Look along the Ryobi rail for sagging belt or chain. If it droops more than about 1 inch at mid-span, it needs tensioning.
• 3. Adjust tension: At the trolley or rail end, locate the tension adjustment nut. Tighten gradually until the belt/chain has slight slack but does not jump on the sprocket during operation. Do not overtighten.
• 4. Check trolley clamp: Ensure the trolley is firmly clamped to the belt/chain. Tighten the clamp bolts if loose.
• 5. Inspect motor sprocket and gear: With the cover removed and power off, check the motor sprocket and internal gear for wear or missing teeth. Replace the gear/sprocket kit if damaged.