EFX 885, 835, 825
Service Manual 20039-166
Page 45
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Troubleshooting 3.27 - P80 Touch Screen Unresponsive
Description
Touch screen does not respond to any touches. Screen may show a static or a moving image, but is not completely
black.
Possible Causes
1.
Console was improperly calibrated or has fallen out of calibration
2.
Console has locked up.
3.
Touch Screen is defective
Possible Remedies
1.
Use Single Secret Handshake to enter screen calibration.
See Single Secret Handshake Procedure below
.
See Procedure 3.6, Systems Test.
Ensure the person
recalibrating is standing on the machine and is not holding on to the console or any other part of the machine
while doing so.
2.
Reboot the machine
3.
If touch screen has failed entirely, console will need to be replaced. This is not a replaceable part.
Single Secret Handshake Procedure
Press the Pause key and continue holding it down while you press in sequential order an U configuration on the
Volume and Channel key pad (
Channel Up,
Channel Down,
Volume Down,
Volume Up).
See Diagram
3.27.1.
Release the Pause key when done pressing the arrows. Note: The keypad U configuration sequence
should be not faster than 1 second between each key stroke. Any speed faster than 1 second may result in an
unsuccessful access to the sign-in screen.
Diagram 3.27.1
1
3
4
2
Volume &
Channel Key Pad
Pause Button
Содержание EFX 825
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