DIsco FEver: As for the exact nature of the tech problem, I'm sorry but it has no relevance to anyone other than to EK and the operating crew.
The words Private&Confidential spring to mind.
We pax may not be able to do anything about it, but we are naturally curious about what is wrecking our day as well as yours.
Plus if you can tell us that what's broken is a widget that makes the engine turn, not a widget that keeps the coffee hot, we are likely to be a lot less bolshy and a lot more sympathetic to you taking whatever time you need to fix the problem and to get us going where we're going, safely.
Most crew on most airlines I fly on seem to have no difficulty in giving a simple explanation about what's gone wrong.
But if you give us pax the mushroom treatment, we will feel unloved. And then go to the competition next time. Simple fact of commercial life.
There's nothing private and confidential about what's broken on an aircraft that's gone tech, except in airlines that want to cover up everything.