HP Color LaserJet Enterprise MFP M680 series - Page 10

Telnet client ................................................................................................ 116
Network connection ................................................................................... 117
Connect a remote connection ...................................................................................... 117
Disconnect a remote connection .................................................................................. 122
Troubleshooting process .................................................................................................................................. 124
Determine the problem source ....................................................................................................... 124
Troubleshooting flowchart .......................................................................................... 124
Power subsystem ............................................................................................................................ 125
Power-on checks .......................................................................................................... 125
Power-on troubleshooting overview ......................................................... 125
Scanning subsystem (M680) ........................................................................................................... 129
Control panel checks ....................................................................................................................... 129
Control panel diagnostic flowcharts ............................................................................ 133
Touchscreen black, white, or dim (no image) ............................................ 134
Touchscreen is slow to respond or requires multiple presses to
respond ....................................................................................................... 135
Touchscreen has an unresponsive zone .................................................... 136
No control panel sound .............................................................................. 137
Home button is unresponsive .................................................................... 138
Hardware integration pocket (HIP) is not functioning (control panel
functional) .................................................................................................. 139
Tools for troubleshooting ................................................................................................................................. 140
Individual component diagnostics .................................................................................................. 140
LED diagnostics ............................................................................................................. 140
Understand lights on the formatter .......................................................... 140
Engine diagnostics ........................................................................................................ 145
Defeating interlocks ................................................................................... 145
Disable cartridge check .............................................................................. 146
Engine test button ...................................................................................... 147
Paper path test ............................................................................................................. 148
Paper path sensors test ............................................................................................... 148
Manual sensor and tray/bin manual sensor tests ....................................................... 150
Manual sensor test ..................................................................................... 150
Tray/bin manual sensor test ...................................................................... 152
Print/stop test .............................................................................................................. 154
Component tests .......................................................................................................... 155
Component test (special-mode test) ......................................................... 155
Scanner tests (M680) .................................................................................................... 158
Scanner tests .............................................................................................. 158
Diagrams ......................................................................................................................................... 160
Block Diagrams ............................................................................................................. 160
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