NEC MC2400 - Manual (Page 131)

Problem Solving 5-11
Characters are Distorted or Incorrect
Check the following:
! Are the brightness and contrast controls properly adjusted on the video display?
Refer to the documentation supplied with your video display.
! Are the video monitor's signal and power cables properly installed?
! If the problem persists, the video monitor may be faulty or it may be the incorrect
type. Contact your service representative for assistance.
System Cooling Fans Do Not Rotate
Note: The system has a cooling fan module (containing either
two or three fans) behind the hard disk drives. In addition, there are
two fans one directly in front of and one directly behind the system
board, including a place reserved for an optional fan directly under
the rear fan, and another cooling fan that is an integral part of each
power supply. There are no serviceable components inside the
power supply. If the power supply is opened, the manufacturer's
warranty is voided.
Check the following:
! Is AC power available at the wall outlet?
! Are the system power cords properly connected to the power supplies and the AC
wall outlets?
! Are the power connectors for the cooling fan module and fans connected to the
system board?
! 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.
Diskette Drive Activity LED Does Not Light
Check the following:
! Are the diskette drive's power and signal cables properly installed?
! Is the diskette drive properly configured?
! Is the diskette drive activity light always on? If so, the signal cable may be plugged
in incorrectly.
If you are using the onboard diskette controller, use Setup or the SSU to make sure that
Onboard Floppy is set to Enabled. Conversely, to use an optional fixed/diskette
controller, make sure that Onboard Floppy is set to Disabled. For information about
running Setup or the SSU, refer to the “Configuring Your System” chapter.
If the problem persists, there may be a problem with the diskette drive, system board, or
drive signal cable. Contact your service representative for assistance.