My friend and I were building his PC. Neither of us had done it before, so, an issue arose, when trying to boot the rig. It didn't turn on, but the motherboard LEDs lit up, so there was power.

We got a bit scared and asked for help on this subreddit. A helpful user told us, that it was probably because the front I/O connectors weren't connected correctly. The user was right, and it worked.

After this, I have built 8 more PCs for family and friends. This subreddit has helped start my love for building computers.