I was having a problem with my HP MSA 1040 not responding to the management web page, so I found a tech article that said if you SSH into the system and run the following command, you can restart the management controller to get the page to come back up. It took about 2 minutes for the system to restart but eventually it came up

#restart mc A

https://support.hpe.com/hpesc/public/docDisplay?docId=mmr_kc-0132694