The Lights Were On. The Screen Was Black.
My son and I built his gaming PC in 2024. After roughly two years of working across different games, it started losing video. The fans kept spinning. The RGB lights kept pulsing. The monitor said no signal. I had been an A+ certified technician. I wasn’t afraid to open the case, but I wanted evidence before replacing an expensive graphics card. We investigated with Codex. It helped inspect Windows events, record GPU telemetry, build graphs and run controlled tests. I checked the physical display, challenged assumptions and decided what to try next. ...