Interpreting The Diagnostic Lights - Compaq Evo D500 USD Getting Started Manual

Interpreting the Diagnostic Lights

Computer LEDs
LED
Power
Power
Power
Power
Power
Power
Power
Power
Power
Network Controller
Network Controller
Hard Drive
*Power LED may not flash on some models.
Quick Setup & Getting Started Guide
Compaq computers feature diagnostic lights or LEDs (light emitting
diodes) to indicate various computer states or errors. The following
tables describe the diagnostic light indications. Refer to the
Troubleshooting Guide on the Compaq Reference Library CD for
more information.
Color LED Activity
Green On
Green 1 flash every 2 seconds
Green 1 flash every 2 seconds
Clear Off
Clear Off
Red 4 flashes every 1
second, or 2 flashes 1
second apart followed
by a 2 second pause
Red On
Red 1 flash every second
Red 1 flash every 2 seconds
Green On
Green Flashing
Green Flashing
Getting Started
State/Message
(S0) Computer on
(S1) Normal suspend mode
(S3) Suspend to RAM
(if applicable)
(S4) Suspend to disk
(if applicable)
(S5) Computer off
CPU thermal shutdown
CPU not installed or
incorrect processor
installed
ROM error
Power supply overload
Network link
Network activity
Hard drive activity
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