Oh yeah Motherboards I have had loads fail...usually ASUS ones (particularly the asus A7N8X Nforce 2 board, the first 2 I owned had fauly bios chips that managed to wipe themselves [one day I would turn on the system, and it would power - but nothing, no post, no beeps, just nothing..RMA revealed a bios chip with nothing on it..])
The cheap ones I used to buy were just as bad, the terrible ALI chipset based ones (urgh) or various other budget ones...good job I have learnt my lesson from those boards