HP LASERJET ENTERPRISE M775dn - Page 165

Touchscreen has an unresponsive zone
Figure 2-3 Touchscreen has an unresponsive zone
N
Y
N
Y
N
Y
Touchscreen
has an
unresponsive
zone
Is the area of the
touchscreen you are touching
greyed out (intentionally
deactivated)?
Does the previously
inactive area respond
to a touch?
Open the
diagnostic function.
Perform the
red-grid touch test.
Turn the product
power off,
and then
on again.
Does the previously
inactive area respond
to a touch?
Replace the
control panel.
Do not replace the
control panel.
ENWW
Troubleshooting process
133