Odds are it is the control panel for the door. Someone put it on lock and your friend didn’t know to look there.

Have someone use a heavy duty extension cord and plug the cord to the garage door opener into a known wall plug that is working - could be shorted or bad wall pug where the motor is plugged into right above the motor. Good Luck

Bad GFCI
 

Now that you have tried all other options, run an extension cord from the garage opener to another outlet, and see if it works.

As the garage opener is tied to one specific outlet, that outlet may have a red light on letting you know that it's bad. I ended up having to have that outlet replaced.

Good luck.

I had to have 2 breakers replaced in my new home in The Villages. Also when the electrician came out he told me you have to push the breakers to the right and snap them back.

If you know the breaker number even thou the breaker doesn't show the flag turn it off then back on and see if that works.

No Power to garage door
 

I've had this problem a couple of times. The first place to look is the GFI outlets in the garage. I know you checked, but do it again. One of mine was somewhat hidden. Be certain the green lights are on the outlets. Second was a loose wire in the outlet that controlled the openers. It was intermittent. When I pressed a plug into the outlet, it would affect that connection. Good luck.

Get these testers
 

Lots of references to checking for voltage or 'get a meter'. To most people this is effectively meaningless.

What you need is either a non-contact voltage detector,

Here: https://www.amazon.com/Klein-Tools-N...voltage+tester


OR

A circuit tester here: https://www.amazon.com/Sperry-Instru...=outlet+tester

Better yet, both

Here: https://www.amazon.com/KLEIN-TOOLS-N...=outlet+tester

I have only linked good brands above, there are cheaper brands available. These tools are small and well worth having.

Edit to add: For those who don't bother clicking on the links, these are less than 8.00 to as much as a whopping 23.00. They will pay for themselves many times over for this sort of occasion

There is a reset button on each garage door unit.

Never though of that. Could their be a fuse in the opener too? I do not think I have one but I could.

It could be another GFI between the ones you checked and your mains if there is more on that circuit.. Doesnt make much sense that both went down, has to be in the circuit between the motors and your mains..

Interesting, of the 25 posts:
3 said check the beam
7 said check the breaker
8 said check the GFI
4 said check the control panel switch
2 said use an extension cord.
Does anybody ever read previous posts?:duck:

yeah, but who's countin'...

Add one more who said get the proper tool to diagnose the problem.

Get a new Chamberlain if you can. Rechargeable battery. No one else will have the same programable button.

Duct tape. If the women don't find you handsome, they should at least find you handy.