Screen Flickering on Display port

Have you tried reseating the video card in the ones that are bad?  Could be they are loose from shipping.   To verify what the problem is, swap a video card from a good system with one that is flakey and see if the problem goes with the video card or stays with the PC.  That will at least tell you where the problem is and then you can contact Dell to get those corrected.

Hi Mastermat,

We have the exact same issue.  Out of an order of 60 PCs we have work slips for seven that have failed in this way.  The "fix" so far has been to replace both the motherboard and graphics card that has seemed to work in most cases.  Having said that we have one "fixed" machine that is misbehaving once again.

This has happened on both  our XP sp3 image and Windows 7 image.  The newer 790s don't appear to have any issues so far.  Granted we only have five of those at this stage.

I wonder if we have just lucked out on a bad batch.

Hi ts_dsr,

We have done some testing, and we found replacing the Dell Display port to DVi Cable worked. We recieved two different batches of these cables, and it seems the cables made by BizLink are occasionally faulty, so far the problem has not reoccurred.

Thanks for the info, maybe if it happens again, we will give that a go

We put in about 20 opti 780's and they have video issues on just about everyone.

Tube monitor won't return from sleep

Dell flat screens flicker non stop

Non-dell flat screens re-adjust icons locations, pixels, icon sizes

The video cables were the ones used on the previous machines for the most part

These video cards have been a huge headache and waste of time

I have encountered the same issue on some of our optiplex 780's.  We have about 150 of these units.  The issue has been experienced using the onboard graphics.  There are two connectors, VGA and displayport, and the problem only occurs on the displayport connector.

One of the displayport connectors is branded "Amphenol" DP/N 023NVR.

Dell now realizes that the DisplayPort to DVI dongles are problematic and will replace them under warranty without too much convincing on the phone to the support personnel.  Unfortunatly, our company bought 150 Optiplex 780's with ATI graphics cards and 023NVR adapter dongles.  I asked Dell if they would recall all of the adapters we have and replace them with new ones.  I was told that there will be no recall and that I have to call about each one that fails.  So far, after having the 780's for about a year, I have called to replace about 60 of the defective BizLink 023NVR adapters.

In some cases I have seen the ones branded as "Amphenol" and "Molex" also go bad.  We even purchased an adapter from HP thinking that maybe the Dell ones are the only bad ones.  We were wrong about that too.  The one from HP made by FOXCONN has also failed.

I really wish these tech companies would get their act together and make some quality products.

The lesson in this situation is to purchase the extened warranty.  It's the only way Dell or any other company will treat you fairly and replace faulty equipment they produce or contract to produce.

I just experienced the same problem with a new optiplex 780. I have 2 monitors, one Dell and one Costco special. The Costco special was flickering continuously when hooked up to the display port (using display port to DVI adapter from Dell (says: Amphenol). The Dell was connected to VGA.

I was about to call Dell for a new adapter but also noticed that my win 7 automatically identified the Dell monitor as "Dell model #XXXX" and the Costco special was unknown. Anyway, when I switched the two adapters’ it now works fine. E.g. the display port to DVI works fine when plugged into the dell monitor.

Anyway, just sharing. Perhaps there is some specific signal strength need that a dell <> dell monitor match is able to achieve?