You downgraded to XP not upgraded. Vista came after XP. VGA is the worst video setting. You cannot use today's monitors and expect good results. What OS are you using now? You really need to buy a new computer. Don't spend anything on the 14 yr old computer.

The error message is because you are using both the video card and the integrated video. You cannot use them both. Either unplug the integrated video and try the old card alone. Or remove the card from the computer to use just the integrated video. The integrated video will not work if there is a video card installed on the motherboard. Even if it is not used or connected. Take it out and toss it.

Thanks for your reply. I won't argue which is the better OS between XP and Vista. The fact is that I need XP to run a film scanner that requires it. Also, the new monitor does work using the VGA onboard graphics while the other card is installed. Maybe that's a clue as to how to move forward.

I tried to disconnect the integrated video in the BIOS, but there isn't a Video category, so there's no option for that. Can you explain what you meant by "unplug the integrated video". 

@OrangeTang  -

Actually, XP was a downgrade from Vista...

You could physically remove the add-in video card and use the onboard VGA connector to eliminate the unsupported config error. But VGA is a low quality analog signal, compared to a digital signal like DVI.

There are several different types of DVI connectors, so did you get the right cable, and does the new monitor support the type of DVI output the video card sends?

If you installed XP but didn't install all the hardware drivers, that's a problem too.  Dell offers Inspiron 530 drivers for XP.  Make sure you select XP on the list before downloading any drivers. Start by installing the chipset driver, and then the rest of them. 

Since you're not sure which video card you have, you can enter the Service Tag for this PC on the Support page (don't post it here) and follow the link to System Configuration. See what video card is listed and then download/install the correct XP video driver from the support page for this model.

Have you ever tried running that scanner software in Compatibility Mode in a newer version of Windows on this or on another PC? I have XP software running in XP Compatibility Mode on a new Win 10 PC. Install the software in a newer OS, and then right-click its icon and select Properties from the menu. When that opens, click the Compatibility tab and select XP. See if that software runs that way...

See if you can find the right XP driver for the ATI Radeon X600 card here. Note: the drivers for the X600 and X600SE are different so get the right one.

What type DVI port is on the ATI video card? If you're using a single-link DVI-D cable, it can be plugged into a dual link DVI-D port, but it will only carry a single-link signal. So is your monitor capable of using a single-link DVI-D signal? Maybe you need to ask Acer support.

Does this monitor require its own driver and is the driver compatible with XP?

BTW: Some monitors are dumb and have to be manually configured to use the port it's connected to on PC. Open the monitor's On-Screen Display (OSD) by pressing a button(s) on the monitor and look through the options to make sure it's configured to use DVI.

This site says the Acer S230HL monitor has a VGA port. If that's correct, why not just remove the add-in ATI card and connect VGA(PC)>VGA(monitor) and be done with it?

RoHe - My Acer S230HL monitor has a DVI-D dual link port and the cable I have is a DVI-D single link, so they should be compatible.

I went to the Dell site previously and entered the service tag #. Unfortunately, the System Config page is blank.

When I 'downgraded' to WinXP, I installed all of the drivers but at the time, I was using a VGA monitor. I am pretty sure that I have a ATI Radeon X600 card.  FYI - ATI was bought by AMD many years ago.

Here is a list of the Dell XP video drivers available. Not sure which to try.



I still think that I need to find a way to disable on-board graphics. Haven't been able to figure that out as there is no option in the BIOS.

A newer OS using compatibility mode is an intriguing idea. I haven't tried. Unfortunately, a newish computer is out of the budget, at this time. 

Thanks

System halted!
Attention: Unsupported Video Configuration Detected

Action is Required

This computer has an add-in graphics card, but the monitor is plugged
into the integrated video connector.
To attach the monitor cable to the add-in graphics card:

1. Shut down the computer
2. Plug the monitor cable into the add-in graphics card connector.
This may require a video adapter or video adapter cable.
(provided with the system)
3. Turn on the computer.

This message should not appear after completing these steps.
For more information or help, please refer to the system documentation

@speedstep not sure why you posted the error message, as that's why I started this thread.

@RoHe Oops, I forgot to look at the port on the card. It matches the port on the monitor; both are DVI-D Dual-link. However, it seems that my DVI-D Single-link cable may be the problem. I found the monitor user-manual online and it says: DVI Cable (Optional, only Dual-Input Model). *I don't know if dual-input and dual-link are the same thing, but I'll try it. I should be able to source a cable locally, tomorrow. If it doesn't help, I'll keep working on finding drivers, etc.

I suspect "dual input" means a monitor that has more than one type of video input port, eg DVI + HDMI.

What video resolution is set in Win 10 and in the the monitor's OSD, when using the single-link DVI cable?  Single-link DVI can only support up to 1920 x 1080 at 60 Hz. So if the res isn't set correctly somewhere...

@RoHe The monitor displays either VGA or DVI upon start-up, depending on what it's connected to, so I don't think it's a dumb monitor. And, the VGA port works but, as you said in your first comment, "VGA is a low quality analog signal, compared to a digital signal like DVI." 

"So is your monitor capable of using a single-link DVI-D signal? Maybe you need to ask Acer support."
I haven't yet but I will contact them.

@RoHe  Of course you're right about the dual-input meaning. You were also correct with your idea that I might not have installed all the hardware drivers. I found some notes from years ago in the folder where I saved the drivers that I'd installed. I had never successfully installed the display driver. So, again, I searched for the correct VGA driver and stumbled upon a freeware program called Unknown Device Identifier v9.01. It told me that I had an "Intel G35/G33/G31 Chipset Integrated Graphics 1". So, I went to the Dell Driver Support page and searched for those terms. It showed me the correct driver (R158511.exe). *It's actually the first driver listed above in the Drivers Available picture that I posted above. I would not have known which driver to select without the program. Success! So, the VGA connection is now as it should be and there are no issues in the Device Manager. 

I hoped that I'd be able to connect the DVI cable and let the Unknown Device Identifier program tell me which card I had. It said that I have a ATI Mobility Radeon HD 3600 series. I don't know if it's correct. With great difficulty, I found a couple of drivers, but neither installed properly. At this point, I'll either stick with the VGA connection or, more likely, buy a newer video card that should come with the correct driver.

What do you think? Also, should I select one of your comments as the 'solution'? Thanks for your help and any further advice!

@OrangeTang  - You should be very careful about going to sites like the one you used to scan your hardware. Who knows if it's a safe site that won't install malware or steal data when you're not looking?

Always better to go to known/trusted sites like Dell, AMD, Intel...

Dell's driver for your Intel Graphics is quite old. You can go to Intel's own Download Center and download their Support Assistant. Install it and let it scan your hardware and offer any newer Intel chipset and video drivers for your specific PC. Install them and reboot...

If you have a 3600 series ATI/AMD video card and running Win XP, 32-bit, AMD has a driver here that should work.  If you're using Win XP, 64-bit, there's a different driver here.

If the monitor still doesn't work correctly with the single-link DVI cable after installing the ATI driver, you'll need to find out if that monitor can support single-link DVI or only supports dual-link DVI.

But at least you got the VGA working.

You can mark one of my posts as the solution if it solved your problem.

@RoHe  Yes, I try to be careful when visiting web sites. The download site that you directed me to is one that I found. It seems very sketchy. It's riddled with ads and they represent the site as the "Unofficial AMD/ATI Czech Drivers Site". On top of that, I was unable to find a working download link on the site. 

The Intel Driver & Support Assistant does not support Windows XP, unfortunately. 

ATI Mobility Radeon HD 3600 is legacy now so you wont be able to use the latest video drivers.

The auto ati configurator DOES NOT WORK for legacy devices.

Radeon HD 1000 2000 3000 4000 DX10 5000 6000 7000 8000 DX11  series are all EOL and Legacy.

https://www.amd.com/en/support/graphics/amd-radeon-hd/ati-radeon-hd-3000-series/ati-radeon-hd-3650

That error has ZERO to do with any drivers.

It comes from the Legacy Bios for systems that have INTEL GMA Graphics on the chipset not the CPU

It halts the system and tries to display this specific message:

System halted!


Attention: Unsupported Video Configuration Detected

Action is Required

This computer has an add-in graphics card, but the monitor is plugged
into the integrated video connector.
To attach the monitor cable to the add-in graphics card:

1. Shut down the computer


2. Plug the monitor cable into the add-in graphics card connector.
This may require a video adapter or video adapter cable.
(provided with the system)


3. Turn on the computer.

This message should not appear after completing these steps.


For more information or help, please refer to the system documentation.

BIOS TEXT SCREENcannot use onboard vga or display port or dvi when card is in the X16 slot

Regarding the need to run WIN XP so that an older scanner can still be used, I'd recommend that you try using VueScan software from Hamrick.com to run the scanner. This can be downloaded as a trial and it will run virtually any scanner no matter how old it is, and what WIN version it was originally designed for.

I'm currently successfully running a Canon N1220U scanner that dates from 2000, and that was originally designed for WIN 95/98, on a computer running WIN 10.