Touchscreen has an unresponsive zone
Figure 2-3
Touchscreen has an unresponsive zone
N
N
Touchscreen
has an
unresponsive
zone
Is the area of the
touchscreen you are touching
greyed out (intentionally
deactivated)?
Open the
diagnostic function.
Perform the
red-grid touch test.
Replace the
control panel
(E-version).
Do not replace the
control panel.
Does the control
panel respond
to a touch?
Y
Is the same area
of the touchscreen
unresponsive on the
diagnostic screen?
Y
When you draw
your finger across the
screen do dots appear
only where your
touching?
When you draw
your finger across the
screen do dots appear
only where your
touching?
N
Do the following:
1) Plug the product into a differnent power
source (on a differnet circuit if possible).
2) Reflash the control-panel firmware, and then
perform the touch test again.
Y
Y
Y
N
N
Reflash the control-panel
firmware, and then perform
the touch test again.
ENWW
Troubleshooting process
129
Summary of Contents for LASERJET ENTERPRISE MFP M725dn
Page 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
Page 2: ......
Page 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 32: ...xxx ENWW ...
Page 142: ...110 Chapter 1 Theory of operation ENWW ...
Page 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Page 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Page 516: ...484 Appendix A Service and support ENWW ...
Page 545: ......
Page 546: ... 2013 Hewlett Packard Development Company L P www hp com CF066 91023 CF066 91023 CF066 91023 ...