NEC PowerMate CT manual Keyboard or

Problems and Solutions

Problem Symptom Solution

Keyboard or	Monitor has prompt, but
mouse	cannot input data using
malfunction	keyboard or mouse.

Monitor	Unable to synchronize
malfunction	display.

Wavy display.

Blank display.

CD-ROM drive	System power not on.
malfunction
	Disc tray does not open.

1.Check keyboard/mouse plugged in.

2.Clean mouse

3.Check password (see Section 2).

4.Disable password (see Section 2).

5.Replace keyboard (or mouse).

6.Replace system board.

1.Adjust the monitor’s synchronization controls.

2.Check that the monitor’s resolution matches the video setting or the video driver used.

3.Check that the utility is not selecting a refresh rate/resolution that is not supported by the monitor.

4.Check that the driver used matches the capabilities of the video controller and DRAM.

1.Check that the system and monitor are not near motors or electric fields.

1.Press any key or move the mouse to ensure power management has not blanked the display.

2.Check that the monitor power On/Off switch is

On.

3.Adjust brightness and contrast controls on the monitor.

4.Check that the monitor cable is attached to the video connector at the back of the system.

5.Check cable connections between the AC power supply and monitor.

6.Replace monitor.

1.Turn system power on.

1.System power not on. Turn system power on.

2.System power failed. Insert the end of a straightened paper clip into the emergency eject hole, then gently press inward until the tray opens.

7-8 Troubleshooting