System doesn't boot up on Solaris 10

Error : Boot returns to the Ok prompt without booting

Boot device : net    File and args :

can't open boot device

It should be due to incorrect nvram setting.

1) ok  printenv 

search nvram variable for pcix-probe-list where x is typically “a”,“b”, etc

2) ok setenv pcix-probe-list #  

Where # is one greater than numbers shown on list. For example, if pcia-probelist is 1,2,3,4 then setenv pcia-probe-list 5

Do this for each pci probe list shown

3) ok reset

4) ok boot