Sun Fire V240 Server Amber LED Glowing

HI,

we are having sun fire 240 server,This Server get restart automatically, after that the amber light was glow

when i tring to put the prtconf command the system going to hang.then i tried to prtdiag command, itshow below givens

======== FRU Status =========

-

Fru Operational Status:

-

Location Status

-

MB/SC faulty

PS0 unknown

HDD0 unknown

HDD1 unknown

PS1 unknown

[462 byte] By [sulo] at [2007-11-25 22:47:48]