We just had a server that was displayed in the HP Insight Manager (HPSIM) with Heal Status: Major. But viewing the System Management Homepage (SMH) of this server only showed: System Status Healthy.
It turned out that HPSIM checks (by default) the SMH as well as the SNMP status. But SMH itself can only displays data from one data source.
The solution: Change SMH to retrieve the data from SNMP instead of WBEM:
What a little bit until the SMH agents has restarted and the status of HPSIM and SMH will match again. In our case, the faulty component was the network interface of ILO: