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HP Color LaserJet Pro M155-M156 User Guide - Page 69

The Attention and Ready lights are on, Table 6-4

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Table 6-4 The Attention and Ready lights are on State of the printer Action The printer has experienced a fatal error from which it cannot recover. 1. Turn off the printer or disconnect the power cord from the printer. 2. Wait 30 seconds, and then turn on the printer or reconnect the power cord to the printer. 3. Wait for the printer to initialize. If the error persists, contact HP customer support. ENWW Interpret control-panel light patterns 61

Section	Page
Printer overview	9
Warning icons	10
Printer views	11
Printer front view	11
Printer back view	12
Control panel view	13
Printer specifications	14
Technical specifications	14
Supported operating systems	14
Mobile printing solutions	16
Printer dimensions	17
Power consumption, electrical specifications, and acoustic emissions	17
Operating environmental range	17
Printer hardware setup and software installation	18
Paper trays	19
Introduction	20
Load Tray 1	20
Introduction	20
Tray 1 paper orientation	23
Load and print envelopes	26
Introduction	26
Print envelopes	26
Envelope orientation	26
Load and print labels	27
Introduction	27
Manually feed labels	27
Label orientation	27
Supplies, accessories, and parts	29
Order supplies, accessories, and parts	30
Ordering	30
Supplies and accessories	30
Customer self-repair parts	30
Replace the toner cartridges	32
Introduction	32
Remove and replace the toner cartridges	34
Print	37
Print tasks (Windows)	38
How to print (Windows)	38
Manually print on both sides (Windows)	38
Print multiple pages per sheet (Windows)	39
Select the paper type (Windows)	39
Print tasks (macOS)	41
How to print (macOS)	41
Automatically print on both sides (macOS)	41
Manually print on both sides (macOS)	41
Print multiple pages per sheet (macOS)	42
Select the paper type (macOS)	42
Additional print tasks	42
Mobile printing	43
Introduction	43
Wi-Fi Direct (wireless models only)	43
Enable or disable Wi-Fi Direct	44
Change the printer Wi-Fi Direct name	45
HP ePrint via email	46
HP ePrint software	46
AirPrint	47
Android embedded printing	47
Manage the printer	49
Change the printer connection type (Windows)	50
Advanced configuration with HP Embedded Web Server (EWS) and HP Device Toolbox (Windows)	51
Configure IP network settings	54
Introduction	54
Printer sharing disclaimer	54
View or change network settings	54
Rename the printer on a network	55
Manually configure IPv4 TCP/IP parameters	56
Printer security features	57
Introduction	57
Assign or change the system password using the HP Embedded Web Server	57
Energy-conservation settings	59
Introduction	59
Print with EconoMode	59
Set the Sleep/Auto Off After Inactivity setting	59
Set the Shut Down After Inactivity delay and configure the printer to use 1 watt or less of power	60
Set the Delay Shut Down setting	61
HP Web Jetadmin	63
Update the firmware	64
Update the firmware using the Firmware Update Utility	64
Solve problems	65
Customer support	66
Interpret control-panel light patterns	67
Restore the factory-set defaults	70
A “Cartridge is low” or “Cartridge is very low” message displays on the printer control panel	71
Change the “Very Low” settings	71
Order supplies	72
Printer does not pick up paper or misfeeds	73
Introduction	73
The product does not pick up paper	73
The product picks up multiple sheets of paper	73
Clear paper jams	74
Introduction	74
Paper jam locations	74
Experiencing frequent or recurring paper jams?	75
Clear paper jams in Tray 1	77
Clear paper jams in the rear door and the fuser area	78
Clear paper jams in the output bin	80
Improve print quality	82
Introduction	82
Update the printer firmware	83
Print from a different software program	83
Check the paper-type setting for the print job	83
Check the paper type setting on the printer	83
Check the paper type setting (Windows)	83
Check the paper type setting (macOS)	83
Check toner-cartridge status	84
Print a cleaning page	84
Visually inspect the toner cartridge or cartridges	85
Check paper and the printing environment	85
Step one: Use paper that meets HP specifications	85
Step two: Check the environment	85
Step three: Set the individual tray alignment	86
Try a different print driver	87
Check the EconoMode settings	87
Adjust Print Density	88
Calibrate the printer to align the colors	89
Adjust color settings (Windows)	90
Print and interpret the print quality page	90
Resolving print quality problems	92
Introduction	92
Troubleshoot print quality problems	92
Solve wired network problems	100
Introduction	100
Poor physical connection	100
The computer is using the incorrect IP address for the printer	100
The computer is unable to communicate with the printer	101
The printer is using incorrect link and duplex settings for the network	101
New software programs might be causing compatibility problems	101
The computer or workstation might be set up incorrectly	101
The printer is disabled, or other network settings are incorrect	101
Solve wireless network problems	102
Introduction	102
Wireless connectivity checklist	102
The printer does not print after the wireless configuration completes	103
The printer does not print, and the computer has a third-party firewall installed	103
The wireless connection does not work after moving the wireless router or printer	103
Cannot connect more computers to the wireless printer	103
The wireless printer loses communication when connected to a VPN	104
The network does not appear in the wireless networks list	104
The wireless network is not functioning	104
Perform a wireless network diagnostic test	104
Reduce interference on a wireless network	105