Hi, I have a MacBook Pro. It is plugged in and charging but will not switch on. I try pushing ctrl, shift, alt and power together then release and press power again. The laptop goes to a white screen but switches off straight away. Any ideas?

Hi, I have a MacBook Pro. It is plugged in and charging but will not switch on. I try pushing ctrl, shift, alt and power together then release and press power again. The laptop goes to a white screen but switches off straight away. Any ideas?

P.s. it is now going to apple logo on white screen then switches off

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