3115T R3 Thin Line Industrial Flat Panel PC
Chapter 5 – Troubleshooting
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141876(E)
Note
It is not necessary to read this section if you are a Windows or
OS/2
®
user and do not plan to run DOS applications.
Unlike a CRT monitor, a flat panel display has a fixed horizontal and vertical
resolution. There are many DOS video modes whose resolution is less than that of a
flat panel display. In order to more efficiently make use of the flat panel display’s
active area, it is necessary to employ an expansion technique, which stretches the
lower resolution information to fill the higher resolution of the display.
For example, DOS defaults to VGA video mode 3+. This is an 80 column, 25-row
text only screen whose effective resolution is 640 dots x 400 scan lines. Because of
this, the 800 x 600 display of the system will be partially filled by the 640 x 400
resolution of this particular mode. The expansion function uses lower resolutions
that will better utilize the display by stretching the information in an attempt to fill
the display.
Operating systems such as Microsoft Windows
98 and Windows NT use display
drivers to handle the different flat panel displays. Here, expansion is not necessary
since there is a specific driver for each resolution display.
Expansion does not add any resolution to the existing information; it simply stretches
the information to better fit the display. Text and graphic screens can look somewhat
grainy from the process of expansion.
Touch Screen Drivers
If you have a touch screen driver that has been factory installed, you will also
receive, pre-loaded and at no extra charge: MS-DOS, Windows 98, Windows 2000,
Windows NT, and Windows XP Professional touch screen drivers.
Note
If you ordered a system pre-loaded with an operating system, the
touch screen driver was pre-installed.
You must install the corresponding touch screen driver software if you change the
operating system. The touch screen drivers are located on the Document and
Support Library CD under:
\DRIVERS\TOUCHSREEN\TOUCHKIT
