HP ProLiant BL20p G3 Server Blade - Manual (Page 97)

Server Blade Troubleshooting
Figure A-1: Power converter module LED location
Table A-6: Power Converter Module Troubleshooting Table
Status Description
On The power is good and the power converter modules are
working.
Off The power converter modules are not fully seated and must be
reseated.
or
The power converter modules have failed and must be replaced.
A-12 HP ProLiant BL20p Generation 3 Server Blade User Guide