Acer Altos R710 - Manual (Page 162)

6 Troubleshooting 150
4 If there are still no characters on the screen after you reboot the
system and POST emits a beep code, write down the beep code
you hear. This information is useful for your service
representative.
5 If you do not receive a beep code and characters do not appear,
the video display monitor or video controller may have failed.
Contact your service representative or authorized dealer for help.
Characters Are Distorted or Incorrect
Check the following:
• Are the brightness and contrast controls properly adjusted on the video
monitor? See the manufacturer’s documentation.
• Are the video monitor’s signal and power cables properly installed?
• Does this video monitor work correctly if plugged into a different system?
System Cooling Fans Do Not Rotate Properly
If the system cooling fans are not operating properly, it is an indication
of possible system component failure.
Check the following:
• Is the power-on light lit? If not, see “Power Light Does Not Light”
• If your system has LED lights for the fans, is one or more of these LEDs lit?
• Are any other control panel LEDs lit?
• Have any of the fan motors stopped? Use the server management
subsystem to check the fan status.
• Have your fans speeded up in response to an overheating situation?
• Have your fans speeded up in response to a fan that has failed?
• Are the fan power connectors properly connected to the server board?
• Is the cable from the control panel board connected to the both the
control panel board and to the server board?
• Are the power supply cables properly connected to the server board?
• Are there any shorted wires caused by pinched-cables or have power
connector plugs been forced into power connector sockets the wrong way?
Diskette Drive Activity Light Does Not Light
Check the following:
• Are the diskette drive’s power and signal cables properly installed?