HP Touchsmart 310-1126 won't power up. When I hit the power on button it flashes three times but nothing happens. So far I have replaced the power supply and motherboard, same thing. I have a new CPU on order but was thinking that even if CPU is bad, should not the fan still be working? When I hit the power on button, the green light at the power plug in goes a little dim and the fan tries to move but only for about a quarter turn. Hopping someone out there can shed some light on this.