How can I fix my laptop that has been dead for a year?

I have a Lenovo Ideapad y700 15isk that's about four years old. About a year ago, it shut down because I couldn't charge it anymore so it died and I'm just now trying to fix it because I never used it anyway. I thought maybe I needed a new charger so I bought an Insignia AC adapter but someone at Best Buy told me it might not work on my Lenovo. I still tried it and surely enough my laptop still wouldn't turn on/charge. Then I thought maybe I needed a new battery and I read online that I should take it out, plug in the power chord and hold the power button for 15 seconds, but that didn't work either. Should I try ordering the same ac adapter that came with my lenovo, or maybe get a new battery? Any suggestions would be greatly appreciated.

Bios update claims to not be installed?

I recently installed a new bios update for my lenovo laptop. I successfully installed the update and rebooted my computer, but lenovo vantage continues to display the update under "critical updates" and occasionally sends me notifications.

How do I replace my laptops hard drive with an SSD?

I have a Lenovo z70 that recently stopped working. It would boot to a black screen and system restores and resets did not work. So I went and bought a Samsung 860 Evo SSD and replaced it. Now I'm getting an error saying boot failed. Any advice?