2. Use the controls on the monitor to adjust the brightness and contrast.
3. Check DIP switches 1-5 and 1-6 on the front of the main unit to make
sure they are set correctly for your monitor.
4. Remove any diskettes, then turn off the monitor and main unit. Check
to see that the monitor power cable is securely connected to the electri-
cal outlet, and that the monitor cable is properly connected to both the
monitor and the main unit. Turn both power switches on again.
5. With the computer turned off, check the electrical outlet for power. Plug
a portable lamp into the outlet you are using for the monitor, and turn it
on to see if it supplies power.
The Computer Locks Up or Freezes
If the computer appears to be locked up and does not respond to the
keyboard, try the following:
1. Wait a few seconds. Some operations take longer to perform than oth-
ers. For example, a spreadsheet program takes longer to recalculate an
entire spreadsheet than to simply enter a figure. Also, some BASIC
programs that have a lot of calculations to perform can take several
minutes, or even hours, to finish. Be aware of the task the computer is
performing and judge the time period accordingly.
2. If the computer remains locked up, follow the steps in Chapter 2 under
“Resetting the Computer.”
Floppy Disk Problems
There are many kinds of disk problems that could occur, and just as
many reasons for them happening. If you are having trouble with your disk-
ettes, check the following questions:
1. Is your diskette damaged? If you are getting bad results of any type, the
disk could be damaged. Just to be sure, try your backup diskette to see if
the same problem occurs. If the backup works, the first diskette is
probably damaged. Make another working copy from your backup.
2. Do you have the right type of diskette? In a 360KB drive, use double-
sided, double-density, 48 TPI, 360KB diskettes. In a 720KB drive, use
double-sided, high-density, 135 TPI, 720KB diskettes. The diskette type
is normally shown on the manufacturer’s label.
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