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5-8 Problem Solving
Check the following.
Is AC power available at the wall outlet?
Are the system power cords properly connected to the system and the AC
wall outlet?
Is the power connector for the cooling fan connected to the system I/O
board (option board fan) and the CPU base board (CPU fans)?
Is the front panel power on indicator lit?
If the switches and connections are correct and the power outlet is functioning,
the power supply has probably failed. Contact your service representative for
assistance.
No Characters Appear On Screen
Check the following.
Is the riser card fully seated in the system I/O board connector? The riser
card is the small card that the mouse and keyboard plug into.
Is the keyboard working?
Is the video display plugged in and turned on?
Are the brightness and contrast controls properly adjusted?
Are the video display switch settings correct?
Is the video display signal cable properly installed?
If you are using an option video controller board, perform the following:
1. Verify that the video controller board is fully seated in the system board
connector.
2. Run the RCU to disable the onboard video controller.
3. Reboot the system for changes to take effect.
If there are still no characters on the screen after you reboot the system, contact
your service representative or authorized dealer for assistance.