Data General AViiON 4600 Series, Клиентская документация

Страница: 243 / 266

Solving Power–Up Problems
C-7
014–002091
-
l
O
Brightness Contrast
+ - +
Degauss
Color monitor (front/side view)
Power
NOTE: Press the Degauss switch in to activate.
Rotate the Brightness and Contrast controls left
and right for clearer screen display.
Figure C-1 Monitor Brightness and Degauss Switch
3. If your screen display remains unreadable or unclear, contact Data General as
described in the Preface.
Unclear Terminal Display (AViiON 4600 Series)
Try the following if your terminal screen displays messages, but they are distorted or
unreadable.
1. Make sure that the cable connection from the RS232A port to the terminal is
secure.
2. If the keyboard has an On Line" key or indicator, toggle that key. If you know
that the keyboard is on line and your screen is still blank, do the following:
a. Disconnect the terminal from the computer unit.
b. Turn on the terminal power to see if the terminal diagnostic self-test
message appears. If the terminal does not pass its diagnostic test, try a
different terminal as system console.
c. Use the keyboard to type something. If the characters appear on your
terminal screen, reconnect the terminal to the computer unit and power up
the computer again. If nothing appears on your terminal screen, there could
be a problem with the terminal cable.