The backpack appears to operate too slowly. Multimedia programs
seem to “stutter” or skip frames
This will occur if the backpack is connected to a parallel port that is not
Enhanced (EPP compatible). If your computer’s parallel port is an original
unidirectional or bidirectional parallel port, backpack will not be able to
operate at its optimum speed. Use the CDDRIVES /x utility (Referred to in
Section 3.1) to determine your computer’s “Port” type.
After you install the backpack, the printer doesn't work properly.
This can occur if the power to the backpack is not on. In some cases, the
printer will appear to work even though the backpack power switch is off.
For reliable operation, make sure the backpack power switch is in the ON
position and the power unit is plugged in securely.
After you have connected two backpacks, only one of them is as-
signed a drive letter. Either drive works properly if connected by it-
self.
This can occur if two or more backpacks are set to the same internal drive
ID number. When more that one backpack is installed on the same com-
puter, they must all have distinct internal drive ID numbers. Drive ID num -
bers are assigned at the time of manufacture but can be changed with the
SETID program. Refer to Section 3.4 for information on changing ID num-
bers.
The message “LPT1: not found” appears when you are trying to use
the printer.
This can occur if the power to the backpack is not on when your computer
starts up. Make sure the backpack power switch is in the ON position and
that the power unit is plugged in securely. Restart the computer using
CTRL-ALT-DEL.
The message “Error: backpack CD-ROM drive requires DOS version
3.10 or higher.” appears when the computer starts.
The backpack device driver has determined that the version of DOS is not
adequate for adding a CD-ROM drive. Upgrade DOS on your boot drive
and try again.
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