Server Hangs at boot

Hi Guys,
I have a SunBlade 1500 which I use to practice at home. Suddenly when I power on the server it just displays the solaris banner and Boot device: disk File and args: Then it stops and says " rebooting with command: boot"

It doesn't boot to the kernel. Is there anyway I can possibly fix this? I will gladly appreciate your help.

Thanks Guys

when you boot your server ... it taking minimum 15 mins for bringup ... plz wait ..

Thanks coolboys.
However, for a practice machine that's too much. The server does not boot at all. Not even after 24hrs. I tried remote login (rlogin), seriel; no success. It stays at booting.

have already fixed it by now? or still waiting for some suggestion?

If still waiting, do you see init.d started ? or see something like loading kernel modules...blahblahblah..
Do you recall something fishy done in your last logon
Can you not try the rescue method with dvd rom.. ?

try to boot with:

ok> boot -m verbose
ok> boot -m debug
ok> boot -m milestone=none
ok> boot -s

And see if any of those work, and check the error messages or where it get stuck.

Do you see any error at all on the console

still is not booting .. then you better replace the ram