Installation or device with a high-definition multimedia interface

An installation or device equipped with a power supply unit and a High-Definition Multimedia Interface (HDMI), said power supply unit comprising a converter defining a primary side and a secondary side, this installation or device being able to be connected to a second HDMI device with which it can communicate by using a protocol defined in the HDMI Standard, this installation or device being able to be set in Standby or Power-down mode and to be removed from this Standby or Power-down mode by said second HDMI device via a Consumer Electronic Control (CEC) line, wherein the installation or device has a Power Management Unit (PMU) arranged on the primary side of said power supply unit, this PMU having its own power supply circuit directly connected to the power supply source (VSUP) of the installation or device and being arranged for switching OFF the electrical energy on the secondary side of said power supply unit when this installation or device enters said Standby or Power-down mode, wherein said PMU is associated with CEC means on said primary side for decoding and processing at least a wake-up signal of a CEC Protocol defined in said HDMI Standard, wherein it comprises a CEC interface which is arranged for directly communicating with said CEC means on said primary side, and wherein said CEC interface comprises a HDMI supply domain and a PMU supply domain which are isolated from each other by a galvanic isolation, a data transfer between these HDMI and PMU domains via said CEC line being operated only through one or several non-galvanic element(s).0