Does power interfere with HDMI?
Similarly, can HDMI provide power?
HDMI is not generally intended to be used as a power supply, unless the port is marked as an MHL port. Then it can provide 5 volts to charge mobile devices while they are connected to the display.
Hereof, how do power cables affect signal transmission?
Electromagnetic interference (EMI) is caused when the flux lines of a strong magnetic field produced by a power conductor cut other nearby conductors and cause induced voltages to appear across them. When signal cables are involved in the EMI process, this causes a noise in signal circuits.
You dont get any voltage readings with the FVD on the surface of the tv or on the connected hdmi cables. Sometimes every tv is bleeding voltage and we install one for every tv to protect the equipment.