Keyboard/Mouse Problems; Optical Drive Problems - NEC POWERMATE eco Service And Reference Manual

The screen display is fuzzy or flickering; graphics characters or garbage
appears on the screen.
Check that all connections have been made.
Check that the video refresh rate and video driver are correct.
Check display properties. Click the right mouse button anywhere on the Windows desktop
and a menu appears. Click

Keyboard/Mouse Problems

Check the following problems to see the possible cause and solution.
Mouse or keyboard does not respond.
The mouse or keyboard might have been connected after turning on the system. Turn the
system off, make sure the mouse or keyboard is connected, and turn the system back on.
Image appears on screen but nothing happens when using the mouse or
keyboard.
Make sure the keyboard or mouse cable is firmly connected to the back of the system.
If this does not help, turn off the system, wait five or more seconds, and turn on the system.
Mouse cursor moves erratically or not at all.
Clean the mouse (see Chapter 6, "Preventive Maintenance").
If this does not help, the mouse might need to be replaced.

Optical Drive Problems

Check the following problems to see the possible cause and solution.
The drive is not reading a disc.
Check that the disc is inserted in the disc tray with the printed label side up.
Check that the disc is a data disc, not a music disc.
Try a different disc to see if the problem is limited to one disc.
Clean the non-label side of the disc with a soft lint-free cloth, gently rubbing from the
center of the disc to the outer edge of the disc. Or use a commercial disc cleaner.
Clean the optical drive with a commercial CD drive cleaning kit.
The disc does not eject due to a power failure or software error.
Turn off the system and use the emergency eject feature. Insert the end of a paper clip into
the emergency eject hole on the front of the drive. Press inward on the clip to open the door.
The drive plays music CDs but there is no sound.
Adjust the volume control on the side of the system unit.
Check the volume control in the system tray along the taskbar.
Check that the optical drive is secured tightly in the optical drive bay.
7-4 Troubleshooting
and the Display Properties window appears.
Properties