My HP Omen Laptop Suddenly Won’t Turn On, Any Fixes?

I have an HP Omen 16 gaming laptop that's about three years old. The other day, while I was watching Twitch, I stepped away to make some tea. When I returned, the laptop was completely off and won't turn on at all. There are no lights or signs of power; even the charging light isn't showing. I mainly keep it plugged in because the battery life isn't great. I've looked online for solutions, but I haven't found anything that works. What can I try before I take it to a repair shop? It's no longer under warranty.