Touchscreen Has An Unresponsive Zone; Figure 2-3 Touchscreen Has An Unresponsive Zone - HP LASERJET ENTERPRISE M725dn Troubleshooting Manual

Touchscreen has an unresponsive zone

Figure 2-3
Reflash the control-panel
firmware, and then perform
the touch test again.
Replace the
control panel
(E-version).
ENWW
Touchscreen has an unresponsive zone
Touchscreen
has an
unresponsive
zone
Is the area of the
touchscreen you are touching
greyed out (intentionally
deactivated)?
N
Open the
diagnostic function.
Perform the
red-grid touch test.
Does the control
N
panel respond
to a touch?
Y
Is the same area
of the touchscreen
N
unresponsive on the
diagnostic screen?
Y
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.
When you draw
your finger across the
N
screen do dots appear
only where your
touching?
Y
Y
Do not replace the
Y
control panel.
Troubleshooting process
129