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I replaced the capacitor ($13), & if worked good, there was no bulging or telltale signs on the old one. Now if I can find the limit screw to the light that stays on, would be perfect.

I replaced the capacitor ($13), & if worked good, there was no bulging or telltale signs on the old one. Now if I can find the limit screw to the light that stays on, would be perfect.

Here are the symptoms. It would freeze even with the chain off, but I cycled the chain back to closed, reatached chain, & actually got it to cycle up & down once, but continues to rise a foot, then stop, or go back to reverse. If I hold the remote, or door button down, it forces the door to go...

With the chain disengaged, gears are good condition, I can turn shaft via the cup on the end, plug it back in, will start to move, stop, then hum. Pushing the on again, just hum, which seems like bad brushes in the motor. The capacitor looks ok, with an ohmmeter, the ground & continuity are...

The gears move good manually, not stripped, when I removed the chain & tried to get it to work on its own, it tried to go, then buzzed. Looks like I need to troubleshoot, the motor, capacitor, & sensor board.

I managed to turn the shaft counterclockwise a bit via the cup, & it started acting normal. It would take the chain back to the limit in the open position, (with door detached) & stop when it ran out of chain, which is normal, then I hit the button again, & start to go in reverse, but stops...

he black interupter cup on the back of end of the shaft looked like it had loosened, I reattached it, turned it clockwise, it would turn the chain with the door disengaged, unplugged the sensor harness to reset, & got some action out of it, when I tried it again, would move the chain a few...

The door travel is ok when disengaged with the rope, I noticed a black plastic cup on the end of the shaft, some kind of actuator, that was crooked, when I tried to push it back on with a screwdriver, I could get it to turn the white drive gear, but it would slip back off. I looked up the part...

The door travel is ok when disengaged with the rope, I noticed a black plastic cup on the end of the shaft, some kind of actuator, that was crooked, when I tried to push it back on with a screwdriver, I could get it to turn the white drive gear, but it would slip back off. I looked up the part...

The opener (139.53310) was acting erratically would stop going up then go back down a few feet. The gear is ok (picture), now no motion at all, only a buzz that dims the lights a little. Past history of this, the tentants hit the garage corner with their car, knocking the rail out of alighment a...

Can a battery pac be rejuvinated useing a power supply (dc) or an auto battery charger? Looking to find life in my old power pack. Thanks