Some devices have a pause function that is controlled by the associated remote control, e.g. in TV, receivers, media players, etc. Please check if pause has been activated, and if it has you can deactivate it by simply pressing this pause button on the remote again. You will find more information on the remotes functions in the devices user manual.
If your product is being used as an external player please check if the connection cable (for example HDMI, Scart, etc.) is properly plugged in. If you are unsure then unplug them and reiinsert them to make sure they are connected and seated correctly.
Hard drives contain mechanical components, such as fast rotating metal plates and moving writing and reading heads which can cause noises such as buzzing, creaking, clicking and clunking during normal operation.