Some systems (usually those containing old ROMs) emit a low-high error tone
upon startup before starting the internal diagnostics. To proceed, merely
power the Lisa off and back on.
Other errors, ones usually associated with hardware failures, sometimes appear
on Lisas in the 7/7 Office System. Typically, you may have neglected to erase
your hard disk before installing the 7/7 Office System. After you safely backup
your documents, reinstall the software after first erasing the present contents
of the hard disk.