An optical signal transferring apparatus comprising: a signal transfer unit (31, 110) comprising one or more optical signal lines (111, 710) and one or more power lines (112, 720); a first connector (32, 120) arranged on a first end of the signal transfer unit and configured to convert an optical signal to and from an electrical signal, wherein the first connector is connectable to an electronic apparatus (11, 200); and a second connector (33, 130) arranged on a second end of the signal transfer unit and configured to convert an optical signal to and from an electrical signal, wherein the second connector is connectable to a source device (21, 300), characterized in that in response to a control from the electronic apparatus receiving a power-on input to turn the electronic apparatus on: at least one optical signal line of the one or more optical signal lines is configured to transfer an optical signal from the electronic apparatus (11, 200) to the source device (21, 300), wherein the optical signal triggers the source device to control transmission of power and to start data transmission; and in response to the optical signal being detected by the source device: at least one optical signal line of the one or more optical signal lines is configured to transfer the data from the source device to the electronic apparatus, and at least one power line of the one or more power lines is configured to supply the power from the source device to the electronic apparatus. a signal transfer unit (31, 110) comprising one or more optical signal lines (111, 710) and one or more power lines (112, 720); a first connector (32, 120) arranged on a first end of the signal transfer unit and configured to convert an optical signal to and from an electrical signal, wherein the first connector is connectable to an electronic apparatus (11, 200); and a second connector (33, 130) arranged on a second end of the signal transfer unit and configured to convert an optical signal to and from an electrical signal, wherein the second connector is connectable to a source device (21, 300), characterized in that in response to a control from the electronic apparatus receiving a power-on input to turn the electronic apparatus on: at least one optical signal line of the one or more optical signal lines is configured to transfer an optical signal from the electronic apparatus (11, 200) to the source device (21, 300), wherein the optical signal triggers the source device to control transmission of power and to start data transmission; and in response to the optical signal being detected by the source device: at least one optical signal line of the one or more optical signal lines is configured to transfer the data from the source device to the electronic apparatus, and at least one power line of the one or more power lines is configured to supply the power from the source device to the electronic apparatus. at least one optical signal line of the one or more optical signal lines is configured to transfer the data from the source device to the electronic apparatus, and at least one power line of the one or more power lines is configured to supply the power from the source device to the electronic apparatus.