7-4
Troubleshooting
4. With the DAS-TC/B board out of the computer, check the computer
for proper operation. Power up the computer and perform any
necessary diagnostics.
At this point, if you have another DAS-TC/B board that you know is
functional, you can test the slot and I/O connections using the instructions
in the next section. If you do not have another board, refer to the
instructions on page 7-1 before calling Keithley for technical support.
Testing the Accessory Slot and I/O Connections
When you are sure that the computer is operating properly, test the
computer accessory slot and I/O connections using another DAS-TC/B
board that you know is functional. To test the computer accessory slot and
the I/O connections, follow these steps:
1. Remove computer power again and install a DAS-TC/B board that
you know is functional. Do not make any I/O connections.
2. Turn computer power on and check operation with the functional
board in place. This test checks the computer accessory slot. If you
were using more than one DAS-TC/B board when the problem
occurred, use the functional board to also test the other slot.
3. If the accessory slots are functional, use the functional board to check
the I/O connections. Reconnect and check the operation of the I/O
connections one at a time.
4. If operation fails for an I/O connection, check the individual inputs
one at a time for shorts and opens.
5. If operation remains normal to this point, the problem is in the
DAS-TC/B board originally in the computer. If you were using more
than one board, try each board one at a time in the computer to
determine which is faulty.
6. If you cannot isolate the problem, refer to the next section for
instructions on obtaining assistance.