Control Data Corporation CDC 790ICEM Owner's Manual page 34

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PROCESSOR-ON SWITCH WILL NOT LIGHT AND NOTHING ELSE WILL WORK
The most likely reasons are:
1. The WORKSTATION circuit breaker is OFF. Turn it ON.
2. The MAIN SWITCH, located next to the workstation circuit
breaker is turned off. Press on the 1 on the MAIN SWITCH to
turn it on.
3. The circuit supplying power to the workstation may be off.
Check with building maintenance.
THE TEXT DISPLAY WILL NOT COME ON
1. Be sure the BRIGHTNESS and CONTRAST controls are turned up
(clockwise).
2. Check that the B/W MONITOR CB circuit breaker is pushed in to
the ON position.
ERROR MESSAGES APPEAR ON THE TEXT DISPLAY SCREEN
Generally there are three kinds of error messages:
5-2
• Error messages from the workstation - See the ERROR
MESSAGES appendix.
62950150
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