Apple Macintosh PowerBook 150 - Manual (Page 116)

Memory
A “not enough memory” message appears when you try to open a program.
m Quit any programs you aren’t using, then try again to open the program you
want. If that doesn’t work, restart the computer. Sometimes restarting
makes additional memory available.
m If you are using a RAM disk or a disk cache, reduce its size in the Memory
control panel and then restart the computer.
m If you consistently want to open more programs than memory allows, you
can purchase a memory expansion card from your Apple-authorized dealer.
SCSI devices
You can’t turn on the computer after connecting a SCSI device.
m SCSI devices must be turned on before the computer itself. Turn on any
SCSI devices first, and then turn on the computer.
The computer doesn’t recognize your SCSI devices.
m The devices may be off. Check to make sure that they are plugged in and
turned on.
m If the device is a disk drive, it may need to be initialized before you can use
it. See the instructions that came with the device.
m The software (driver) needed to run the device may not be installed in your
System Folder. See the instructions that came with the device.
m Two or more devices in the SCSI chain may have the same ID number.
Check the ID number of each device to make sure each one has its own
number between 1 and 6, and change any numbers that are not unique.
m When connecting SCSI equipment, it’s important to use the right cables
and the correct number and placement of cable terminators. Check the
cables and terminators in the SCSI chain and make sure that all cables are
firmly attached. The first and the last external device in a SCSI chain
should be terminated.
See Chapter 8 for more information about working with SCSI devices.
108 Chapter 9