Power problem

Hello DJ Akhay,
I read the whole page, but I may have a slight different problem.
When I power on my computer and push the 'start up' button, the green light flashes for split of a second, the fans move and then NOTHING happnes. I have plugged off and on all the power supplies. In fact, the SMPS box was also changed last week, but still same problem. It does start up randomly 1 out of say 50 times.
I have tried the RAM test, but I guess there is no power to make the beep. In any case, I took the RAM out and used the eraser... but still the same green light for a split second.
Is there any hope?