Asus PC boot failure

My Asus PC (a Rog Strix G15) suddenly switched off and refused to boot back again. No boot, no lights, not even charge light when connected to power. Nothing has happened to it, it just suddenly happened (but I must add that a couple of months before this problem I opened up the PC to insert a second SSD for dual booting purposes, but after the operation the laptop booted up with no issues, and this problem is happening one month later, so I don't think it has much to do with it). After a while, like 15 minutes, I tried to turn it back again and it actually responded! Lights lit up, the keyboa

Question by Noumeno on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.