I have a failed F-190HD board too. Antec true power 550W PSU, Samsung spinpoint 500gb HDD, Corsair xms 6400 2x1gb twin x memory at 2.1v.
Worked for 3 days but was not on very much. Then refused to boot one morning, never touched it or overclocked it. the 2 board lights are on the fans spin but no beep. There may not be on board post speaker on the board so cheked with external post speaker no sound. Did all the usual tricks cleared the cmos, took out the battery, moved the memory. No post no video still. I am really pissed off. Overclockers Uk dont give a dam about it even though they suppilyed it.
Sounds like this is really shoddy work from Abit, this is the first of their boards I have had. I worry now that I going to get into a viscious circle of duff replacment boards.