Mac mini M4 does not recognise a monitor via HDMI or Thunderbolt

How the problem presents

The more precise the description, the fewer unnecessary tests will be required:

Components to rule out

These are the areas that should be examined in this case:

The cause is confirmed through measurement and actual behaviour, not by similarity to another Mac.

What information speeds up the diagnosis

Before sending the device, state the screen size, approximate year, capacity, charger type used and the exact moment the fault appeared. Also explain if there was liquid exposure, a fall, an update, a prior repair or progressive loss of battery life.

This information does not replace measurements, but it allows us to prepare appropriate tests and avoid actions that could jeopardise the internal storage.