Important to say that the computer worked fine at the same config. during the past 6 monthes.
this problem came in suddenly.
I think it's the MB since It got sruck BEFORE the "detecting IDE devices".
it halted for 2-3 minuted, than it said "detecting IDE devices.." than addition few minutes.
important to say that in one of the tries, it showed only half of the row of the memory check.
I mean - it showed only untill the numbers (can't remember what it says there)
than got stuck.
(if it would happen under windows, I would say it's VGA adapter)