2012 MacBook Pro not working despite full battery

My husband tried to turn it on & nothing. I checked it by plugging it into the external power & the plug lit green so the battery is charged but that’s the only good thing. While I have fixed the I mac, it never did function despite all the repairs. So I’m just wondering what can be done if anything. I’ve got my MacBook that won’t work, an iPad so old it won’t upgrade past IOS 12 & an IPhone XR that won’t connect to WiFi anymore! My electronic life sucks! I can’t connect to my chime bank account my only account, I’ve got a final fantasy game that’s getting ripped to shreds because I can’t get on line & my whole financial & vpn security is in shambles!!!