ps6100 psus not showing in gui as being powered on

Hi,

i have the above mentioned server, i have replaced the internal controller battery as it had failed. now the controller is back in the system. when i log into group manager the PSUs are showing as not inserted or no ac power. any way to rectify this?

i have reseated both, changed the power source still no change in the GUI, nothing appearing in the logs either to say they have been removed etc.