Mini to DVI Input on DLP TV

I've read this entire forum and had to try this myself. I went to Tweeter with Mini in hand and plugged it into a WD 62327 Mitsubishi 61" DLP TV (direct DVI input). The picture was excellent except for the top & bottom of the screen were cutoff. I could reduce the resolution of the Mini to its lowest setting and the entire screen was visible but obviously the picture was inadequate. I've seen this mentioned here but can't find a solution, I want to buy this TV but I need the mini connected and perfect (well, at least complete). Any ideas?
PS: Kudos to Tweeter, they had no problem with my experiments and were interested in the results.

Yes, a common but unfortunate problem that rear projection televisons, no matter the technology, overscan the image to make sure the video border is guaranteed to be beyond the physical edge of the screen. This creates big problems when connecting a computer where you expect to see all the pixels, even those at the extreme edge.
Most DLP televisions that I am aware of do not have a user setting to control the amount of overscan. I believe this applies to the Mitsubishi model you have mentioned as well. Unless there is a service setting for overscan inside the TV, the fix will have to come from the computer side.
I am pretty sure that if you make a connection to a televsion using S-video (requires an adapter sold by Apple in the case of the mini), you will then have control of overscan by means of a simple yes/no flag within Display Preferences. Better still, if you install ATI Displays 4.5.6 you will have a more granular level of control of overscan, but again, only over an S-video connection. ATI Displays does have a provision for adjusting overscan on DVI attached displays, but only for "some" graphics cards, and the mini doesn't seem to be one of them.
As far as finding a solution in other third party software, I am not optimistic. There are at least two good programs that allow you to set custom timings, but as far as I know, neither one of them allows you to control overscan on a digital display. Some people will say that altering what are called "porch" timings during video blanking will allow you to control the amount of overscan. While I agree that altering porches will have that affect on an analog, magnetically deflected system as in the case of a traditional TV, they do not work in the same manner for a digital device that is clocked. I'm not calling people liars that have claimed success using this technique, but I think those that have had success have just been lucky.
I realize I'm not offering a solution, or even hope for one. The best I can say is stay away from rear projection TVs if you aim to use them much with a computer connection, unless perhaps the TV is the second head and the primary head is a computer montior.

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