|Check the Slide Lock for the Power switch. If the Lock is engaged with the button depressed it would act the same as a stuck switch.|
This usually happens accidentally and prevents the Laptop from starting but under the right circumstances it could lock the switch on.
The Lock may be difficult to see unless you get it at eye levle. It's supposed to prevent accidental Power On but it's just plastic.
There is nothing to learn from someone who already agrees with you.