No Video 1080p (flickers For A Second), Works On 1080i Options

[wang_chung]

jasper small block system, one day just wouldn't display any video, even on other tv's which were confirmed 1080p compatible tv's.

i did notice that i would get a video signal for a split second every so often, but otherwise nothing. works fine on composite cables.

i got annoyed, and decided to heat-gun the gpu, southbridge and hana. surprisingly, it partially worked. i have video, although there are some pink lines across the screen, and some other graphical errors. since i could actually see the screen now, i decided to try different video modes, and once i moved it to 1080i, everything is perfect with no visual errors.

my question is, does this mean i will require a proper re-flow of the gpu or something else? i am curious though why 1080i works perfectly, but not 1080p? are there two points under the gpu that support 1080p, but only one that supports 1080i, and that one point is good, but not the second?

thanks