HP 2500C Series - Manual (Page 61)

Operating Overview 2-3
Using the Control Panel
Indicator Lights
There are two LEDs (lights) on the printer :
LED Indicators Color Function
Ready LED Green Lit up when the printer is printing
OR in normal state
OR when it is online.
Attention LED Red Blinks when the printer is in an error state
OR requires attention.
Error LED Green + Red
blinking rapidly Both LEDs blink when the printer detects an
error. Power cycle the printer to correct. If the
error persists, push the on-line button once to
see the error message.