QUOTE(RunningRiot @ Apr 5 2007, 07:56 AM)

I have recently installed the Sony LCD SDM-HS73 monitor on my computer. . . . My drivers are all up-to-date and I have downloaded the diagnostic tool from the website, but to no avail.
Sorry for the big post but I really need help

Please don't apologize for the "long" post. It is nice to have information instead of a one line telegraphic "HELP ME! " for a change.
You say that you have downloaded the diagnostic from the Sony website. I am not sure about the "to no avail" part, but suspect you have run the diagnostics they detected no problems? Or they gave you no new information, even while displaying the problems you already had observed? How thoroughly have you explored the use and capabilities of this diagnostic software? (My own experience with monitor diagnostics, limited, is that they rely on user feedback and don't provide much that familiarity with the monitor controls does not provide.)
If you have properly identified the monitor, and the drivers are up to date and properly installed, we can set those issues aside.
You have disconnected the HD15-HD15 video signal cable between the computer and the monitor, checked the pins alignment and cleaned them, and verified that the cable is the one that came with the monitor, right? If so, we can assume the computer - monitor cabling is OK.
Have you inspected and reseated your ATI card? That would be a good thing to do as well.
Have you checked to assure that the video frequency range specified on your computer is in the range specified for the monitor? (See the
Operating Instructions and Setup Guide at
http://esupport.sony.com/US/perl/model-doc...pl?mdl=SDMHS73B for details if you do not have them.)
Does the OS (Start > Control Panel > Display > Settings > Display show the correct Monitor - Graphics Card relationship? This should be something like [Sony SDM-HS73 on Radeon 9600 xxx].
Have you uninstalled the monitor, and reinstalled it using the hardware install procedure or P-N-P? Problems can occur on first install which may be corrected by a reinstallation.
Some other possibilities:
Your dad apparently used this monitor on his machine. Were his problems identical to yours, or different? Knowing the answer could help evaluate the possibility that there is a problem with the interface between your computer setup and the monitor.
If the problems with the monitor are identical to those when your Dad was using it, the probability of a specific problem with the interface between your All-In-Wonder Radeon 9600 256MB and the monitor is reduced. Maybe not eliminated though.
If you wanted to be really sure about that, and your machine has an on board graphics chip, you could uninstall the ATI card and see if the same problems exist with the on board chip. You will need to do the software uninstall and installation of the on board graphic chip, and not just remove the ATI hardware. If the problems go away, or change, you'll have a new starting point for diagnostics.
Before making hardware changes, you make sure that the drivers for your ATI graphics board are current. If you can access ATI support, check to see if the board supports this monitor, or if there are known problems with it.