Hi Jeetendra,
Could you please run a sappfpar check for the profiles in /sapmnt/<SID>/profiles directory :
sappfpar check pf=<Instance profile name>
Check if you are getting any errors in this check. In case of shared memory errors, check for the pool utilization and fix it by taking a key out of the pool.
Once you fix it, try starting the system manually.
Regards,
Manish