Elo TouchSystems E221 Manual Pagina 56

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A-61
A PPENDIX
C
HAPTER
4
T
ROUBLESHOOTING
G
UIDE
If you experience operational difficulties with the touchscreen system either
during or after installation, the following sections will help you determine the
source of the problem.
The Troubleshooting Process
The first step in troubleshooting a touchscreen system is to determine whether
the problem is related to the display, software, or hardware:
Do not confuse display problems with touchscreen problems—the two are
unrelated.
Software problems are determined by a basic hardware functionality test. If
the hardware transmits touch coordinates correctly, then the problem is with
the driver or application software.
Hardware problems may be caused by the touchscreen, controller, cabling,
power supply, or by the integration of the touchscreen components in the
display. This appendix describes techniques for isolating the problem,
including power-on diagnostics, status LED verification, and component
swapping.
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