Keyboard and power problems

I was using my computer one day and it was working perfectly fine the whole day until I got home. I was watching a YouTube video and all of sudden my keyboard and track pad stopped working. So I plugged in my mouse and that worked perfectly fine so I decided to check if I locked my keyboard on accident and i didn’t. I restarted my computer and everything worked fine the keyboard and the track pad, so I log in and bam everything stopped working again. I repeat that process like 3 times with the same results (restarting, logging on, and getting mad) until I finally gave up and left it charging on my desk. The next morning I try turning on the bastard and it doesn’t even power on now! I don’t know if it’s a battery problem or if it’s simply coming to the end of its life. Any advice on what to do will help. Thanks.