HP LaserJet Pro 400 Service Manual - Page 142
Troubleshooting tools, Component diagnostics, LED diagnostics, Network LEDs (network models only) - error 79
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Troubleshooting tools Component diagnostics LED diagnostics Network LEDs (network models only) The onboard network solution has two network port LEDs. When the product is connected to a properly working network through a network cable, the yellow LED indicates network activity, and the green LED indicates the link status. A blinking yellow LED indicates network traffic. If the green LED is off, a link has failed. For link failures, check all of the network cable connections. In addition, you can try to manually configure the link settings on the onboard network solution by using the product control-panel menus. 1. Touch the Setup button. 2. Scroll to, and then touchNetwork Setup. 3. Scroll to, and then touch Link Speed. 4. Touch the appropriate link speed. Control panel LEDs The state of the Ready light and Attention light on the product signal the product status. The following table outlines the possible control-panel light states. Product state Ready light state Initializing Blinking Ready On Receiving data/processing job or cancelling job Blinking Error message Off Fatal error (49 or 79 error)1 On 1 The product will power off and then power on after one of these errors occurs. Attention light state Blinking Off Off Blinking On Memory card LED (memory-card models only) When a memory card is inserted into the correct memory-card slot, this LED turns on. If the LED is not lighting, try the following actions: ● Make sure that the memory card is in the correct slot. ● Make sure that the memory card is not defective. 116 Chapter 2 Solve problems ENWW