ML150 G6 boots only after trying it 2-5 times

[Passi1712]

Hello,

I have an ProLiant ML150 G6 with 2 Xeon E5520, 16 GB RAM and two Smart Array Controllers, P410, E200. When I try to boot it, it will power on and speed the fans up to max. speed. Nothing more happens. Then I power it off and try it again. After 2-5 tries it goes to POST and will boot. Then is everything normal. I can reboot and it works. But when I power it off again and wait a little bit (don't know how long) the problem comes again.

I tried to boot with minimal hardware, updated BIOS; same problem. Does anyone else have the same problem or a solution ?

Greetings

Pascal

(Sorry for my bad english)