Why is the Server's Health Indicator Light Red?
Originally posted on the HP EX48x Support Pages 
This document applies to HP MediaSmart Server EX485 and EX487.
- Solid red - operating system failure.
- Blinking red - power on test has failed or BIOS failed.
To get more information about the failure, the HP MediaSmart Server provides additional error codes.
To get the specific error code causing the failure
Use a paper clip to press and release the recessed Status/Recovery button on the front of the server.
Figure 1: Status/Recovery Button