Some info that may be helpful from:
Q. Can I hook up my Aconda to my computer?
A. The EU Acondas do come in several different versions: with/without a VGA port, with/without TeleText capability. The US has only one version: with a VGA port. If your computer's video card can output VGA (640x480p) then you can use the Aconda as a computer (albeit a bit of a low resolution and slightly squashed looking) display.
Q. Can the Aconda support other computer resolutions? How do I display resolutions higher than VGA (640x480p) on my Aconda?
A. The Aconda's 640x480 resolution is decent for games, but it is a bit of a chore to use the Aconda as a computer monitor for any real word processing, prolonged web browsing, etc. What we need is access to higher resolutions such as 1920x1080i or 1920x520p, however, these are not standard Windows resolutions...
What you need is Powerstrip 3 a very powerful Shareware program for controlling your PC's video card at very low levels. You will also need to have a good Video Card/3D Accelerator like the GeForce or Nvidia chipset based card.
You will also definitely need to check out this Guide to Displaying Custom Resolutions on HDTV posted AVS Forum. It goes into detail on using Powerstrip 3 and the various resolutions avaiable to you. I do not reccomend experimenting blindly on your own unless you really know what you are doing.
Be careful though, incompatible settings CAN PERMANENTLY DAMAGE your Aconda. Make sure you know what you are doing and double check all your settings before applying them. The Aconda Manual lists the Refresh Rate as: 60 Hz, and the Maximum Vertical Scan rates of 31.5 kHz (at 640x480 progressive scan VGA resolution) and 33.75 (for 1080i interlaced HDTV signals).
Make sure you have set these Maximum scan rates in the Powerstrip program and double check to make sure all settings are compatible with these Scan Rates/Refresh Rates, or your Aconda could become a very large and expensive door stop...