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HP t820 Maintenance & Service Manual: Appendix C Diagnostics And Troubleshooting; Leds

Hp t820 flexible thin client maintenance & service guide.
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Diagnostics and Troubleshooting


Table C-1
Power and IDE Flash Activity LEDs
Power LED Off
Power LED On
RJ-45 LEDs are located inside the RJ-45 connector on the top, rear panel of the thin client. The LEDs are visible when
the connector is installed. Blinking green indicates network activity, and amber indicates a 100MB speed connection.
IDE LED is Off
IDE LED blinks white
When the unit is plugged into the wall socket and the Power LED is off, the unit is powered off.
However, the network can trigger a Wake On LAN event in order to perform management
Displays during boot sequence and while the unit is on. During boot sequence, hardware
initialization is processed and startup tests are performed on the following:
Processor initialization
Memory detection and initialization
Video detection and initialization
If one of the tests fails, the unit will simply stop, but the LED will stay on. If the video test
fails, the unit beeps. There are no messages sent to video for any of these failed tests.
After the video is initialized, anything that fails will have an error message.
When the unit is powered on and the flash activity light is off, then there is no access to the
system flash.
Indicates the system is accessing the internal IDE flash.



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