Data General AViiON 4600 Series, Customer Documentation

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Solving Power–Up Problems
C-8
014–002091
3. Verify that the terminal's baud rate, parity, number of data bits, and other
characteristics are set according to the following defaults:
9600 baud
8 data bits
No parity
ANSI character set
Enabled flow control
To change these characteristics after you successfully complete the first
powerup, refer to Chapter 5. For information on changing terminal switch
settings, see the manual that shipped with the terminal.
If your screen display remains unreadable or unclear, contact Data General as
described in the Preface.
Testing With an Asynchronous Terminal
You can use a different display device as system console to determine whether a
powerup problem is an indication of trouble with your computer or simply a faulty
monitor. Your computer should complete powerup even with a monitor that is not
working. You see the diagnostic LED on the computer unit flash after powerup tests
complete, and hear beeps from the computer unit speaker. You should also hear the
computer unit fan spinning inside the chassis.
If the LED and speaker do not signal, or if the fan seems to be slow or not spinning at
all, contact Data General as described in the Preface; the problem is not your monitor.
If your display remains blank but the computer unit LED and speaker signaled, the
monitor could be the problem. If you have another monitor, try that first. However, if
you don't have another monitor, you can use an asynchronous terminal as a system
console. Refer to Chapter 2 for information about disconnecting the graphics monitor
and connecting an asynchronous device to serial port RS232A. Then complete the
steps below to test your computer system using an asynchronous terminal.
1. Turn the computer unit power switch to off. Make sure the computer unit power
cord is plugged tightly into an ac power outlet that is supplying power.
2. Make sure the terminal power cord is plugged tightly into the ac power outlet.
3. Make sure the graphics keyboard is disconnected from the computer unit
keyboard connector.
4. Make sure the terminal cable is connected to the first RS-232-C connector
(labeled RS232A).
5. Make sure that all cables are secured tightly so that they make a good
connection.