My desktop has been having boot up symptoms where pc would power up and immediately shuts down then automatically power up again. Sometime it will turn on and off few times before booting up normally. Recently computer wont even boot up anymore, i would get no display and no HDD activity. The only thing is on is the cpu,case and gpu fans. I thought i had a bad psu so i went and ordered another one, computer still sometimes turns on and off but its alot less then before but it still will not boot up. Do i have a dead mobo?