Testing The Board And Host Computer - Keithley PIO-12 User Manual

Table 5-1. Tr o u b l e s h o o t i n g Information ( c o n t . )
Symptom
Data appears to be
invalid
Computer does not B o a r d not seated properly.
boot.

Testing the Board and Host Computer

To isolate the problem to the PIO-12 board or to the host computer, use
the following steps:
1. T u r n the power to the host computer OFF, and remove power
Caution: Removing a board with the power ON can cause damage to
your board and/or computer.
Possible Cause
The most common cause of this
problem is that the I/O bus speed
is in excess of 8 MHz.
An open connection exists.
Another system resource is using
the specified base address.
The base address setting of the
P10-12 board conflicts with that
of another system resource.
The power supply of the host
computer is too small to handle
all the system resources.
I f your board is not operating properly after using the information in
Table 5-1, continue with the next two sections to further isolate the
problem.
connections to the computer.
Possible Solution
Reduce I/O bus speed to a maximum of
8 MHz (to change the I/O bus speed, run
BIOS setup). See the documentation for
your computer for instructions on
running BIOS setup.
Check wiring to screw terminal.
Reconfigure the base address of the
P10-12 board; refer to for more
information. Check the I/O assignments
of other system resources and
reconfigure, if necessary.
Check the installation of the board.
Check the base address settings of your
system resources; each address must be
unique.
Check the needs of all system resources
and obtain a larger power supply.
5-3