Appliance power problem

[SCar24]

Hi all,
I have a garage door opener that is acting a bit weird and was hoping someone might be able to shed some light on why this is happening?

Liftmaster garage door opener has a power board(WZA27289) that supplies power to the transformer. The problem is that sometimes when it is plugged into the mains the opener does not come to life, but if I take the plug out and in again a couple of times it lights up. So if for instance there is a power outage, the opener might not work, but after doing the unplug/plug in routine it starts working again.
Have checked the board for physical damage, but it looks fine.

What could be the cause of this behaviour?

Cheers,
Sean

 

[Avo Mk8]

Thanks for all your great responses and advise here guys, this is turning into a challenge now to see if I can find the fault If it goes to h*** then there's always Avo Mk8's tip with the replacement board.

There is a UK company selling them as well, but I was sceptical that they might be pricy - worth asking maybe?

Chamberlain Power Board, 0.8 W

Garage Door Openers Spares for Chamberlain, Liftmaster & Motorlift for the Trade Supplier. 0.8W

www.easygatesdirect.co.uk

 

[mainline]

Fair enough. You win

But whenever someone next brings me something to repair that's a few years old I will check the caps with my trusty old ESR meter and no doubt find a couple of duff ones.

As long as the capacitor is an electrolytic and isn't of too low a value