After adding 2 new drives, replacing a defective power supply  and re-installing ESXi 7 and the virtual machines, I am able to access iDRAC via OpenManage. I am thinking that the problem was self inflicted, although the trouble shooter still fails. Thanks to all who responded.  Lou
I installed  Openmanage version 9.5, from the included DVD, on a  Windows 10 system. The T340 is running ESXi 7.01, new install. I downloaded the vib for ESXi and installed. software vib list shows:   dcism                          3.6.0.2249-DEL.700.0.0.15843807       DEL     VMwareAccepted    2021-03-06openmanage                     9.5.0.4145-DEL.700.0.0.15843807       DEL     VMwareAccepted    2021-03-06 When I go to the openmanage (port 1311) and log in, it appears to log in and then gets Failed internal error. The lifecycle log shows:  
OpenManage internal error after connecting