Acer R920 User Manual download pdf (Page 163)

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• Try a different version of the software to see if the problem is with

the copy you are using.

• Make sure all cables are properly connected.

• If other software runs correctly on the system, contact your vendor

about the defective software.

No characters appear on the screen.

Check the following:

• Is the keyboard functioning? Test it by turning the “Num Lock”

function on and off to make sure the Num Lock light is

functioning.

• Is the video monitor plugged in and turned on? If you are using a

switch box, is it switched to the correct system?

• Are the brightness and contrast controls on the video monitor

properly adjusted?

• Is the video monitor signal cable properly installed?

• Does this video monitor work correctly if plugged into a different

system?

• Is the onboard video controller enabled in the BIOS Setup Utility?

• Remove all expansion cards and see if the system boots. If

successful, add the cards back in one at a time with a reboot

between each addition.

• Make sure the memory modules comply with the system

requirements.

• Make sure the memory modules have been populated according

to the system requirements.

• Remove and reseat the memory boards.

• Remove and reseat the memory modules.

• Make sure the processor complies with the system requirements.

• Make sure the processor is populated according to the system

requirements.

If you are using a video controller board, do the following:

1 Verify that the video works using the onboard video controller.

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Acer R920 User Manual Page 163