Commodore 1581 - Page 15

TROUBLESHOOTING GUIDE (Cont.)
Programs won't load
and the computer says
"DEVICE NOT PRESENT
ERROR"
Programs won't load,
but the computer and
disk drive give no error
message
Interface cable not well
connected or drive not
ON
Switches on back of
drive may not be set for
correct device number
Another pan of the
system may be
interfering
Be sure the cable is
properly connected and
the drive is ON
Check Appendix A for
correct setting to match
LOAD command
Unplug all other
^machines on the
computer. If that cures
it, plug them in one at a
time. The one just
added when the trouble
repeats is most likely
the problem
Trying to load a
machine language
program into BASIC
space will cause this
problem
Programs won't load
and red light flashes
Disk error Check the error channel
to determine the error,
then follow the advice
in Appendix B to correct
it. The error channel is
explained in Chapters 2
and3
o
(Be sure to spell program names correctly and include the exact punctuation when
loading the programs)
Your programs load OK,
but commercial
programs and those
from other 1581s don't
Either the diskette is
faulty, or your disk drive
is misaligned
Try another copy of the
program. If several
programs from several
sources fail to load, have
your dealer*align your
disk drive
Your programs that
used to load, won't
anymore, but programs
saved on newly-
formatted diskettes will
Older diskettes have
been damaged
The disk drive has gone
out of alignment
Recopy from backups
Have your dealer align
your disk drive