I think we have a ground loop

[sidewinder]

Had a problem with a projector for months, ever since I started here, the image from the PC has a constant flicker.

Tried running a new cable, a new VGA splitter, tried a new PC, and none worked. I knew it wasnt the projector because connecting it to my laptop worked fine.

 

So after reading a random thread on here the other day about ground loops causing interference, I tried plugging the projector in to the same wall point as the other equipment is plugged into - and voila the flickering is gone!

 

I also tried with other power sockets round the room but they seem to induce flicker too, only the one with the PC/splitter connected to it works.

 

So what do I do? I could run a load of extension leads and plug the projector in by the PC rather than on the ceiling. But that would look a bit messy.

Or is there something an electrician can do? We have a regular one, who I assume fitted the sockets in the first place, what would I need to ask him for?

[localzuk]

I'd say you want to get the electrician to change the power source for the projector to be a spur off the socket the rest of the stuff is plugged into.

[sidewinder]

Thanks