Hi lfb6.
I decided to modify the board to try to solve a reset and shutdown problem that this board presents, I followed the instructions from the following link: The system does not shut down properly and has ME error....need an urgent solution, everything worked as user plutomaniac quoted, however my mistake was not paying attention that my board model was actually GA-H55M-S2 without the V, after doing the flash with the Intel FPT tool the board stopped showing video.
Before doing anything I had removed all the bios chips from the board and copied via external programmer (TL866II), as the board was without video after the flash of Intel FPT I removed the chips again and redo the flash, however the board was stuck in the loop on and off, I suspect the cause is the BIOS_ME because the plutomaniac itself had previously warned that the flash can not be done by other ways than by intel utility.