Flickeringp screen

[Speed addicted]

I bought a 24" dell screen to use with my Sony laptop for editing.
So when the laptop is plugged in the screen flickers, but if you unplug the laptop it stops.

Sony support told me to get a ground isolator, but electrical shops don't seem to have such a thing http://www.amazon.co.uk/Tacima-Conditioner-Frequen...
Is this the right thing? It's really annoying!

[LongQ]

What sort of connection do you have?

Have you compared the output settings from the computer with the native expected settings for the screen?

[crmcatee]

Have you tried chanhing the output frequency of the screen - e.g. 60hz, 70hz

[crmcatee]

Have you tried chanhing the output frequency of the screen - e.g. 60hz, 70hz

[Speed addicted]

It's a VGA cable connection, I tried changing frequency with no change. If the laptop is on batteries the screen is fine, it's only if its plugged in that there is a problem

[LongQ]

Speed addicted said:

It's a VGA cable connection, I tried changing frequency with no change. If the laptop is on batteries the screen is fine, it's only if its plugged in that there is a problem

Ah! You meant when the notebook is plugged in to the mains rather than when it is plugged in to the monitor!

Now I understand.

Dodgy brick (power supply) I would think. You can get extension leads that claim to provide power conditioning facilities but that may not be adequate.

FWIW the only time I have seen anything like that recently was playing with a Raspberry Pi. No happy with the randomly selected power supply (from a different device but nominally just adequate voltage). I also tried it using a a "USB" charger type external battery which seemed to be about .1V down on what the Pi was happy with. It could be kind of OK until the battery got close to total discharge. (There was a purpose to trying that option). However with a pukka power supply giving the full 4.9+ Volts the Pi prefers .... no problems at all.

So I would suspect the brick (if it has one - I'm not familiar with Sonys) or something in the power input socket circuitry.

I could be wrong of course - I'm no expert.

[_rubinho_]

Try an HDMI or DVI cable from laptop to monitor (if supported). The digital nature of the connection is less susceptible to interference.

[Speed addicted]

No Hdmi on the monitor. Would the power conditioner thing make a difference?