in ultra 10 I am facing that problem . My OS is sunOS 2.6.

RPC: TIMED out


warning : time of day chip had incorrect dat : check and rest.
CPU node has invalid clock frequency property.


when I install solaris I reach the point of regions and face the
message :
Select failed error code 22


The date of the Solaris is being changed itself .


I was adviced in other group of NVRAM chip fixing
http://www.squirrel.com/sun-nvram-hostid.faq.html
but my question is :
Is fixing NVRAM chip requires all that hardware capablity ? Can I
replace it with new without that hardware fixing ?