ok, so an update (my 26HF15). I borrowed a HD tuner from my friend and watched the 2007 MLB allstar game with it set to 1080i. It was beautiful. No flicker, no white glow, nothing. Yet, when i plug my 360 back in, It does a little white glow (doesnt bother me though) and the flicker. In order to try to convey what is actually going on, ill describe the "flicker" a little better. Also, I have played my 360 on a different TV (an LCD, Westinghouse forgot model #) and it works fine on 1080i. The LCD tv is a 480p 720p 1080i tv, so I tend to run it on 720p anyways. That means my 360 and component cables are fine, its the TV.
Example game, Madden 08. I use the 49ers vs. Cardinals. That means one red team and one white + red team. They play at my stadium, where all the fans have a lot of red. This is a lot of different shades of red, I hope you've gathered. The field is green (obviously) and there are bits of white on the uniforms and the in-game text. Now, when ever there is movement, the flicker starts. It's as if the TV readjusts its colors ever couple of frames. When it gets real bad It's like almost every frame> I have played with the service menu, to no avail (though I might try again) and restored the defaults. I have played with the normal menu enough to get the flicker down to every few frams, not ever frame (I don't know what adjustments make the biggest difference, although contrast helps more than others). I even experimented, using a different game, Call of Duty 3, with the service menu and took out all the color, turning my picture greyscale. Here's where it gets really bad. It also flickers in greyscale, telling me that it both tries to adjusts the lighting every few frames AND the colors. Depending on the game and the environment of the game, it can bad or bearable. In Call of Duty it is unbearable, the most embarrassing times are when you are getting hit, so the screen starts turning this red like, and the tv fills in all the non red areas with blueish. Another example is in either Madden 07 or 08, in the startup screen where it loads and then asks you to press start. The majority of the screen is blue, with white text and white parts of the uniform and logos. Here, all of the white turns a red shade. Note, the whites dont turn fully red, but its as if I turned my tint up a lot on the red side (-).
I called basically every repair shop in the San Francisco area (where I live), and got two places that told me they could fix it. One said he knew exactly what it was, unfortunatley I couldnt understand much of what he said, but seeing as though he said it would cost $300 I doubt I'd do it anyways. The other store basically said he knew what to do, but he would have to see it, I believe for free. The problem there is lugging my heavy CRT down to a shop with my xbox 360 and games, showing him, etc. Im only 16 so that really becomes an issue, not being able to drive and all, then combined with what the price may be. Ill continue my research online, and if anyone here has a clue what the problem might be, or if they actually know for sure, please tell me. My dad knows a couple of guys that are extremely electronic savvy and Im sure if we knew what the problem was they could fix it.
As to why its such a big deal, its because of the drastic picture quality difference between 720p upconverted on this TV and 1080i. Aside from the obvious flicker issue, the 1080i looks great, convining me that i dont want to look into a replacement. 720p looks terrible in comparison, and even without anything to compare to it just looks poor, bearable but pretty bad. PLEASE HELP!!!