Auto garage door opens will not close not the sensors

Chamberlain Liftmaster garage door opener problems ...

? 3:10
https://www.youtube.com/watch?v=Zq_CxeTXoSM
Jul 2, 2013 - Uploaded by Mike McCarron
Might have taken a lightening strike, knocked out GFCI that was on the circuit that garage door opener was on. When I ... And sometimes after it happens it takes 30 or so seconds before the opener will work again. ... The keypad unit worked well butneither the homelink or the remote units worked.

Garage Door Openers - Lightning Strike - Forum - Bob Vila

www.bobvila.com/posts/30883-garage-door-openers-lightning-strike?...

Aug 6, 2005 - The house did not lose power and I do not believe the house was actually hit. ... the light comes on on the unit (as expected), but neither door opens or ... Afterplugging it back in, try opening the door with the hardwired button first - if it still doesn'twork, chances are your opener's taken some damage but not ...

I Have A Liftmaster Garage Door Opener Unit. The Remote Work ...

www.diyforums.net/i-have-a-liftmaster-garage-door-opener-unit.-the-re.

That's easy!....What you,ve got is whats called in the garage door business as constant hold down! You physically have to hold the button to make the door go down because there is a problem with the infrared sensors, Check both sensors on the sides of the garage door to see if the indicator lights are on ...if not check to see that they are aiming at each other and you will be able to tell if they are by the indicator lights , if they are not aligned your door will not come down! That's the safety feature built in in the event your infrared cameras don,t work so you have to physically stand there to make shure nothing is under the door as it is coming down! Also check your infrared sensors wires to the garage door opener in the event one of them came loose from vibration of the machine ! One other possibility can also be that your sensors where shorted by a nearby lightning strike ...the sensors have small computer boards in them that could get affected in the event of a nearby lighting strike so it will send a surge that can fry them , also I have seen when a house has become flooded the boards also short out ...so if you hav,nt had lightning strikes or floods you can eliminate those senarios, but my guess would be they are not aligned so check that first! Glenn installer of over 30,000 gaarge door openers and still counting! Hope this helps you

Well, I don't think that disconnecting the garage door from the garage door opener would affect function.

The lightning strike could have destroyed the circuitry inside the garage door opener, seeing that it won't operate with the wall switch or remotes.

It's likely that a board was fried by the lightning which would render the garage door inoperable.

There is no reset button and due to it's age no parts available for this model.

Remove the cover and take a look at the drive gear. It sounds like it is stripped.

check electric saftey beams. shovel blocking them. dirty. aligned (LED on in each unit)

Replace the logic board. I have seen this problem in the field. More often than not it's due to power surge or lightning strike.

Replace the opener

Thats one of the symptoms of a lightning strike or a power surge. Without actually being there I would suggest replacing the back-board. But as with lightning strikes and power surges sometimes other electronic components could have been damaged as well.

try adjusted the sensor controls on the sode of the unit other wise replace the logic board
http://www.chamberlain-garage-door-openers.com/circuitboardcompatibilitychart.htm