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A good deal of the time this turns out to be the lid switch. It would need to be checked mechanically (does it click) and electrically (does it complete a circuit when switched).
If you would like more specific information, we will need your model number. You'll find it under the lid on a sticker. It's usually in crevice where the lid meets the cabinet.
Yes, you would be correct (I couldn't tell from your post).
What is the model number? We can take a look at the other causes of this type of problem.
Is an error code showing?
Good work! That is exactly the next step! That is your problem.
I'm guessing you have the information you need already to reassemble. If not, let me know.
That's totally your decision.
What would you have thought was right if you were on this side?
If it wasn't any help. Then nothing is okay, too.
Maybe next time we will have the information you need.