Flickering PC Screens

[VEIGHT]

We have just added a powered splitter to our CCTV system and added 2 extra PC screens so we can see it in different parts of the office.

We now have 1 TV, and 3 screens. the TV and one screen are connected with HDMI, he other 2 RGA and these two are flickering like mad.

I've had a go with resolution - short of buying miles of HDMI cables, does anyone know what might cause it? Would it be bit rate?

[GlenMH]

Do they flicker with the lights off? If not, then it is the refresh rate that needs to be adjusted.

If so, not sure! Sorry!

[Mr Pointy]

Is the splitter doing HDMI to VGA conversion as well as splitting?

How long are the cables?

What resolution are the signals?

[Sonie]

Is there power running close to these cables/monitors?

[Mothersruin]

Refresh rate rather than resolution .

[VEIGHT]

Ok :

Still flickers with lights off.

The CCTV has a HDMI port and VGA, the VGA goes to a splitter then plugs into 2 pc screens (which flicker) and a standard TV screen (which doesnt flicker).

The lengths are all 20m +!

There is LOADS of power cables at each end!

[Mr Pointy]

Any chance you can try one of the flickering screens on a shorter cable maybe 2-3m long? 20m is going some for a VGA cable unles you buy a really good brand.

[VEIGHT]

good idea!

Will test - thanks!