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9. TROUBLESHOOTING
(14) A Serial port or a parallel port does not work properly.
<Possible cause>
There is a problem with the cable connection, or the target device has failed.
<Action>
1. Disconnect the cable and securely reconnect it to ensure a stable connection.
2. See "5.2 Serial Port Setting" and check whether the BIOS serial port setting is correct.
3. Check to see if the target device has failed.
4. If the OS starts while a serial port is receiving data, use the serial port after the OS starts
instead and see whether the problem goes away.
(15) The RAS external contact port does not work properly
<Possible cause>
There is a problem with the cable connection or the interface with the target device.
<Action>
1. Disconnect the cable and securely reconnect it to ensure a stable connection.
2. See "5.5.2 External general purpose I/O specifications" and confirm that the external control
specifications are met.
(16) The equipment cannot be shut down.
<Possible cause>
The OS has frozen.
<Action>
1. Press the Scroll Lock key twice while holding down the right Ctrl key to collect a memory
dump. The equipment restarts automatically after a memory dump is collected. When you
request an analysis of the memory dump (a service provided for a fee), save the log after
you restart the equipment (see "8.3 Maintenance Operation Commands") and contact our
sales representatives.
2. If you cannot restart the equipment at step 1, turn off the power of the equipment according
to the instructions in <Forcibly terminating the equipment> below.
3. If executing step 1 does not resolve the problem, remove all USB devices except a keyboard
and mouse when the power is off and then start the equipment.
<Forcibly terminating the equipment>
If the shutdown fails, press the power button for at least four seconds. The power is turned off
and the equipment goes into the standby mode.
.
9-12
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