Sony Vaio laptop doesn’t boot

I have an old Vaio that I had planned to give to a friend as her pc is
dying a slow death. The last time I booted the thing was about a year
and a half ago when I reimaged it after the SO bought his HP. It has
been sitting unused for that time. It wasn’t dropped or otherwise
injured.

When I try to power it on, it makes no effort to do anything and is not
getting to the BIOS so no beeps that might give me a clue.

It is fully charged according to it’s battery indicator light.

Has anyone ever had this experience? Can you give me some ideas
where to begin to try to fix? Or should I pronounce it a brick and
apply the rubbish solution?

I DO award thumbs for helpful answers. Not like some people around
here.