Boot failure Mac Book Pro 17 "

Hi,

my Mac Book Pro suddenly don´t start.

When pressing the power button the light in front light up for about two seconds, both fans inside start up and the system shuts down after a second - DEAD!

Forcing PW button down, same procedure but the fans are running and the stable light change into blinking after 5 sec, aprox 12 fast repeated blinks and the system is down.

Some guy at iFixit mention it could ba mal function in RAM, but in accordance to infor found here, the light has to blink steady about every second for that malfunction to be reported so I doubht thats the prob.

There is a boo failure, but how to cope with this? I have tried to reset SMC and RAM (cmd - alt P + R)

Any thoughts?

Thanks,

Kasper

Oslo