As I stated earlier, there is not much information you provided here…
What is your OS version?
What do you mean by “tried the hmc and hmc-agent service start tip but this did not work” ? how it did not work? what was the error message you see?
In any case, you can start all the processes manually, but once you removed hmc, there is not way to have it working without reinstalling the whole cluster.
Please, be more specific on your versions, configurations, etc.
Please, send us output from the following commands:
service ntpd status
nslookup `hostname -f`
grep fail /var/log/puppet_apply.log
grep fail /var/log/hmc/hmc.log