IBM 4820, System Reference Manual

Page: 70 / 124

Table 11-1. Touchscreen Status Messages (continued)
Message Definition Recommended Action
A/D Error
Touchscreen hardware error
Replace unit
ASIC Error
Hardware Error
PWM
NOVRAM Error Checksum error in NOVRAM,
using defaults
Random access memory
(RAM) Error
Checksum error in read-only
memory (ROM)
Touchscreen Not Found TouchWare was unable to
communicate with the
touchscreen
Check that all cables for
correctly connected.
Touchscreen properties dialog box
Problem Recommended Action
You have touch, but cannot open the
Touchscreen Properties dialog box.
Only the touchscreen USB driver was installed
and the TouchWare was not completely
installed. Unplug your touchscreen from the
USB port and reinstall the TouchWare.
The Touchscreen Properties dialog box always
opens to the Hardware tab
The TouchWare is unable to find or
communicate with the touchscreen controller.
v
Check the Controller Information box on the
Hardware tab. If the OK message displays,
contact technical support.
v
If the message NOT FOUND displays, review
the cable connections
Calibrating the touchscreen
Calibration defines the dimensions and center of the active area of the touchscreen.
Calibration also aligns the touchscreen-active area to the underlying . Calibrate your
touchscreen when:
v
You initially install the TouchWare
v
The cursor does not accurately follow your finger movement
v
You change the resolution or mode
v
You adjust the touchscreen controller frequency using the Stabilize Cursor function
v You enable or disable the Filtering option
Note: During calibration, the lift-off position of your touch, and not the touchdown
position, determines the calibration point. If your finger is not correctly positioned
on the screen, you can slide your finger to the center of the target. Hold your
finger as still as possible after you reach the calibration point. Do not use any
swinging motion during lift-off.
11-2
4820 SurePoint Solution System Reference