Any way of checking/confirming a faulty monitor?

[The Darkness]

I have a vertical band on my monitor, slightly lighter than the surrounding colours. Its not always there, but when I capture a screenshot when it is there, the line doesnt show up on the screenshot. Someone on the graphics card forum suggested this meant it was a monitor issue.

The monitor is fairly new (phillips 20 widescreen one) and I was wondering if there is a diagnostic tool available anywhere to check this?

Any help appreciated,

Cheers

 

[The Darkness]

That helps a lot - many thanks for the reply. I'll try to work through some of your suggestions tonight. I'm connected by DVI but my video card has two DVI-outs so I'll try the other one.

 

[The Darkness]

Tried all of the suggestions - different graphics card, DVI cable, different drivers (for both card and monitor) and problem persisted. Seems I have a dud - not many reports of faulty ones on the web so I'll try another one of the same model. Phillips will replace it. Thanks for the help,

Cheers