Dell Monitor flickering off and on with ATI x1900

First to start with welcome Scoliansola, and check this out,i have Dell monitor at 1280x1024.
therefore i think its your monitor thats at fault and not OSX it seems like its had enough or its time for a repair.

ATI Radeon X1900 XT:
Chipset Model: ATY,RadeonX1900
Type: Display
Bus: PCIe
Slot: Slot-1
VRAM (Total): 512 MB
Vendor: ATI (0x1002)
Device ID: 0x7249
Revision ID: 0x0000
ROM Revision: 113-A52027-140
EFI Driver Version: 01.00.140
Displays:
DELL 1906FP:
Resolution: 1280 x 1024 @ 75 Hz
Depth: 32-bit Color
Core Image: Supported
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported
Display:
Status: No display connected

Fr. BlayZay.

The best advice from me to you is to take both the monitor and computer to the store, hope-ing it was a store, or to whom you made the purchase from for the monitor and try another monitor, and see what happen, then you will know for sure whats what, even though its new it does,nt means its in a great condition, might works with on windows but not osx that sounds like trouble, hope all work.

Any local Apple store will gladly help you with your on-line purchased item. It's in the rule book.

Michael

Thanks for pointing that out Micheal.W so i guess thats even better, since they were both fr. Apple, therefore its best to book an apointment for both the computer and display.

Fr.BlayZay.

If thats the case suite yourself Scolainsola, however it works fine for me and others, unless again its a ATI x 1900 graphic-card you have was,nt purchase fr. Apple, then its a different card and not the same card that apple sells that one is for windows and not for mac.

Fr. BlayZay.

I have developed this problem recently on my Mac Pro with two Dell 2407s. The screen goes black on each then comes back to life. The Dell's report no input when they go black.

As I also run Windows XP under BootCamp on the mac Pro I was able to confirm this WAS NOT happening under Windows XP so was able to rule out hardware as the cause.

I didn't find an answer to the problem online so called Apple Support.

They had me move the Desktop Folder in my Users\'username'\Library\Caches folder onto the Desktop and then do the same with the com.apple.desktop.plist preferences file from the users\'username'\Library\Preferences folder.
Then restart the computer.

So far it seems to have fixed the problem. They indicated the files moved to the desktop could be deleted as OSX generates new preference files when restarted if it can't find the originals in the correct place.

I hope this helps.

Well done, i am happy to hear your back on track Stephen Hope1

Have fun!

Fr.BlayZay.