I have a PC running Windows XP Proffesional with service pack 2 (just
installed, didnt have this problem before installing sp2) and a iiyama
au5131dt lcd monitor.

At regular intervals the display jumps a little then is completely normal again.

Any ideas on how to diagnose or solve this problem?

Howdy stenning-ga,

An educated guess would be that you are having a driver issue that has been
introduced by Service Pack 2.  Your best bet is to contact Iiyama and see if
they are aware of the problem, etc.  From the Iiyama "Contact Us" web page.
http://www.iiyama.com/

Technical Customer Service
Telephone: 800-594-7480
Fax: 336-852-6790
E-Mail:  service@iiyama.com

To try to diagnose the problem, you can right click on your desktop, then
left click on Properties.  Select the Settings tab, then click the Advanced
button.  Click the monitor tab, etc. and check the settings.

It could be a driver or setting issue with your video card as well, so you
will want to check with technical support for that, and look at any settings
for it that might appear abnormal.

Looking Forward, denco-ga - Google Answers Researcher

Hi

Thanks, I emailed the company using the email address you supplied and
it appears to forward to this company:

http://www.pen-tech.com/

I will let you know if they reply.

Would also appreciate any other ideas you may have. Today it also
jumped seveal times in a row?

Thanks

Howdy stenning-ga,

What video card do you have?  Thanks!

Looking Forward, denco-ga - Google Answers Researcher

Hi

I looked on the device manager and its a nvidia quadro4 580 xgl.

Hope this helps?

Regards

Lee

Howdy Lee,

Here is where you can download the latest drivers for your video card.  You
might download and install these and see if they make any difference.  Make
sure you have the original video card CD in case you have to go back to them.

ftp://download.nvidia.com/Windows/61.76/61.76_winxp2k_international_whql.exe

Looking Forward, denco-ga - Google Answers Researcher

Hi

I had already done that, just in case I reinstalled them and still
have the problem.

Thanks again.

Lee