NS20FC both SP have problem

Hi

we have one NS20FC in our service that using it as block device and our servers mount EMC filesystem.

recently I saw the front fault led of Blade Enclosure, after that I try to connect to it but the management not response at all. I connect to NS20FC from serial cable, after login to nasadmin user system show:

[root@NS20 ~]# su - nasadmin

        *** slot_0 control station ready ***

EMC NAS Service is not running due to one of the following reasons:

  1. EMC NAS Service is still starting or there was an error during

     service start-up.

       Please logout and try logging in after 5 minutes. It can take up to

       15 minutes after Control Station boot for EMC NAS Service to start.

       If the problem persists after 3 login retries, please reboot the

       Control Station and try again. If this message is still displayed,

       contact EMC Customer Support.

  2. EMC NAS Software upgrade is in progress, which required stopping

     the Service temporarily.

       Please DO NOT use the administrative interface while EMC NAS Software

       upgrade is in progress. EMC NAS Service starts automatically after

       the upgrade finishes.

Until EMC NAS Service starts, administrative commands and interfaces

will not operate

I try getreason script, and the result is :

[nasadmin@NS20 ~]$ /nasmcd/sbin/getreason

6 - slot_0 control station ready

0 - slot_2 reset

19 - slot_3 general POST error

how can I reboot slot_2 and slot_3?

how can I be sure that there is no hardware problem?