Maintenance and Service Guide: HP ap5000 All-In-One Point of Sale System

Certain typed symbols do not appear correct.
Cause Solution
The font you are using does not support that particular
symbol.
Use the Character Map to locate and select the appropriate
symbol. Click Start > All Programs > Accessories >
System Tools > Character Map. You can copy the symbol
from the Character Map into a document.
Solving Touch Screen Problems
The touch screen on the HP ap5000 system is integrated into the system which is connected
internally via PS/2 interface. There is no user connection required for this device.
If you encounter touch screen problems, see the common causes and solutions listed in the following
table.
The Touch Screen does not respond.
Cause Solution
Drivers not installed or corrupted. 1. HP does not provide FreeDOS drivers for the Touch
Screen.
2. Windows drivers:
a. Using an account with Administrator privileges Go
to Control Panel > Add/Remove Programs.
b. Look for the touch screen drivers, HP Touchmon.
c. If the drivers are not installed, install them from the
HP POS SW and DOC.ISO, available from
http://www.hp.com.
NOTE: If Windows has loaded the device drivers
for the touch screen there will be an HP icon in the
system tray.
d. If the drivers are installed, remove them and re-
install from a new copy.
e. If the problem persists, re-install Windows or use a
known good installation of Windows to test the
touch screen (try the hard drive from a system with
a working touch screen).
f. Replace the Head Unit.
The Touch Screen does not respond as expected.
Cause Solution
The touch screen requires calibration. Calibrate the touch screen from HP ap5000 Touch > HP
Touchmon Calibration.
Table 4-5 Solving Display Problems (continued)
Solving Touch Screen Problems 25