What should be the immediate reaction if a device is overheating?

When a device is overheating, the immediate and appropriate response is to disconnect the power supply as quickly as possible. This action is crucial because it prevents potential damage to the device, reduces the risk of electrical fires, and safeguards against injury. Overheating can be caused by various factors such as internal faults, inadequate cooling, or excessive load, and by cutting off the power, you eliminate the risk of further escalation of the problem.

Investigation can then follow once the power is disconnected. This might involve checking for loose connections, inspecting for damaged components, or evaluating the device's operating conditions. Ensuring safety comes first, so the immediate reaction must prioritize disconnecting power to address the overheating situation effectively.

The other choices do not prioritize safety and immediate action. Allowing the device to cool down gradually might lead to further risks if the overheating is caused by an electrical fault. Increasing the voltage supply can exacerbate the overheating issue and is counterproductive. Checking warranty information is irrelevant during an emergency situation where immediate action is required to ensure safety and prevent further damage.