HP LASERJET ENTERPRISE M775dn - Tools for troubleshooting

Table 2-9 Heartbeat LED, product initialization (continued)
Product initializing
state
Heartbeat LED, normal state Heartbeat LED, error state
Control panel
connection interrupted
after the product is
operational
Not applicable Yellow, fast flash
●
Control panel not connected
Sleep Mode Green, slow blink Not applicable
Approaching Sleep
Mode
Green, slow blink Not applicable
Wake up from Sleep
Mode
Follows initialization progression Follows initialization progression
Approaching wake up
from Sleep Mode
Follows initialization progression Follows initialization progression
Heartbeat LED, product operational
The following table describes the heartbeat operation when the product completes the firmware boot
process and is in the Ready state.
Table 2-10 Heartbeat LED, product operational
LED color Description
Green
●
Normal operation
◦
Formatter is operating normally
◦
Firmware is operating normally
◦
Control panel is connected
Yellow
●
Formatter cannot connect to the control panel
◦
Check control panel connections
◦
Verify control panel functionality
140 Chapter 2 Solve problems ENWW