I have a very old gas wall heater (probably about 40 years old). When the motor for the fan turns on, there is an audible "click" and the HDMI signal is interrupted for a couple of seconds (i.e. the screen goes black), then the picture comes back. When the fan turns off, there is a slight flicker on the screen, but not all the time.
- The heater and screen are in the same room. I'm not going to move the screen to a different room and freeze to solve this problem!
- The heater and screen are plugged into different power points
- They are 3 metres away from each other, and I don't have any other convenient location for the screen
- I am using a single HDMI switch for different devices
- My DVD player uses a three wire RCA cable (red-white-yellow) and doesn't receive (noticeable) interference, being a less sensitive analogue format
- This only happens when I'm using HDMI, not any other type of connection
How can I either or both:
- shield the wall heater to prevent it "broadcasting" interference
- shield the HDMI cables and switch to prevent them receiving interference