HP Laserjet Enterprice M4555 - Troubleshooting and Problem Solving (Continued); Print Quality and Service Functions; Fax Troubleshooting

Product feeds multiple sheets ................................................................................................. 608
Use manual print modes ....................................................................................................... 609
Solve image-quality problems ................................................................................................ 611
Print quality examples ............................................................................................ 611
Clean the product ................................................................................................................ 615
Clean the paper path ............................................................................................ 615
Clean the scanner glass ......................................................................................... 615
Solve performance problems ................................................................................................. 617
Solve connectivity problems ................................................................................................... 618
Solve direct-connect problems ................................................................................. 618
Solve network problems ......................................................................................... 618
Service mode functions ......................................................................................................... 619
Service menu ........................................................................................................ 619
Product resets ....................................................................................................... 622
Restore factory settings ............................................................................ 622
Hard-disk initialization ............................................................................ 622
NVRAM initialization .............................................................................. 622
Service ID ............................................................................... 623
Cold reset ............................................................................................. 624
Preboot menu options ........................................................................................................... 625
Solve fax problems ............................................................................................................... 632
Is your fax set up correctly? .................................................................................... 632
What type of phone line are you using? .................................................... 632
Are you using a surge-protection device? .................................................. 632
Are you using a phone company voice-messaging service or an answering
machine? .............................................................................................. 633
Does your phone line have a call-waiting feature? ...................................... 633
Check fax accessory status ..................................................................................... 633
Fax feature is not operating .................................................................................... 634
General fax problems ............................................................................................ 634
Problems with receiving faxes ................................................................................. 635
Problems with sending faxes ................................................................................... 636
Error codes .......................................................................................................... 637
Fax error messages ............................................................................................... 638
Send-fax messages ................................................................................. 639
Receive-fax messages ............................................................................. 641
Fax reports ........................................................................................................... 642
Fax activity log ...................................................................................... 642
Billing code report .................................................................................. 643
Blocked fax list report ............................................................................. 643
Speed dial list report .............................................................................. 643
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