I have a v.4 that after modding the the power light had to be pressed for a while for it to come on. I cleaned up with solder braid and am still left with a problem of a black screen that sort of flickers when powered up. I hear that this is a bios solder splash thing, I went over the board and don't see any splashes.

The flicker seems to seperate it from regular bios splash problems

Any help?