When a light or other electrical appliance is switched on it causes the TV to flikker.?

When a light or other electrical appliance is switched on it causes the TV to flicker. We also use a digi box, cable modem.


I assume some sort of surge or flux is causing the problem, is there a product on the market that can be placed between the TV and the mains to act as some sort of damping device.


I already have a Trust anti surge device in situ and the problem occurs when this is in situ or not.|||Your question describes what is happening well enough. It is difficult to be certain exactly what is happening, but whenever a circuit carrying current is broken there is a sudden change in current, perhaps a spark too, which radiates electromagnetic energy - radio energy. This would be picked up by the antenna if you are receiving off air programs, and if it is strong enough will interfere with the desired TV signals. The usual solution is to have an outdoor antenna which is further from the interference, and also picks up the desired signal more strongly, while rejecting the interference because of its directional capability. If you have an outdoor antenna it may not be working properly, or you could have a weak signal.





I'm not sure what a digibox is in your location, but it usually means what we call a set top box, that is a digital TV receiver, that connects to your display. Perhaps you have a community antenna system.





The digi box cable signal is a slightly different situation, in that the cable should be shielded from this interference. However the radiated interference could travel into wiring, and get into your system or the cable somehow. It is posssible that proper grounding of the various boxes will help, though I expect these to be grounded through the power point/wall outlet. Antisurge devices could sometimes provide some sort of filtering, but you say that doesn't help. A specific filter may be better, but I dont know much about where to get such a thing in your location.





One other approach to try is a ferrite clamp absorber. This is a ferrite core that clamps around power cables. You have probably seen them on your VGA cable on the computer, and other cables with USB etc. You could try some of them on power cables near where they enter the TV set, digibox etc. Even the cable that provides the set top box with signal itself. You could buy three or four and experiment.





The links below may lead you to a supplier.|||Your power mains is what we would call dirty, everythings not getting 240v constantly, its something like that, you need to look on this website http://www.isoteksystems.com/ its a company that sell powermains cleaners, plugs and what not, if you purchase one of there mains cleaners it should eliminate your flickering problem because your tv will recieve the same amount of electricity constantly.|||Very close to the TV or computer display, if you keep some gadget with electronic circuits, then they will flicker. Keep these gadgets at least a foot away.