From: kony on
On Wed, 2 Apr 2008 07:07:25 -0700 (PDT),
ennioennioennio(a)gmail.com wrote:

>Hi,
>I've got a Sony VAIO FE11H.
>I've found this issue, wich is very annoying to me.
>When i connect an external monitor to my laptop i get some horizontal
>flickering: it only happens when the power cable of the laptop is
>plugged in. When i disconnect the power cable of the laptop and it is
>powered just by its batteries the flickering disappears instantly.
>
>I've tried using a surge suppressor: no luck.
>I've checked the ground of my electrical system, and it's okay.
>I've tried connecting my laptop to a different external monitor in a
>different electrical system: the problem persists.
>
>So i think there's something wrong on my laptop.
>Can anybody help me please?

If you can get ahold of a suitable alternate AC-DC PSU, try
one.