If the fan is not working or vents are blocked with dust or heatsinks are not connected properly system can overheat.
It may not even be a heat issue, bad video card or motherboard/RAM/CPU issues can crash like a system like an overheat would.
If the fan is not working or vents are blocked with dust or heatsinks are not connected properly system can overheat.
It may not even be a heat issue, bad video card or motherboard/RAM/CPU issues can crash like a system like an overheat would.