Most Xbox faults are fixed quickly and cheaply — from the power supply to HDMI. Here's what we check first.
1. Flashing red light? Most often the power supply or motherboard. Replacing the original PSU solves it.
2. Sound but no picture? Usually the HDMI chip — component-level repair, not a new console.
3. Shuts down mid-game? Overheating — dust or dried thermal paste. Cleaning and repasting bring it back.