Toshiba Qosmio G20 (PQG21) - Manual (Page 156)

9-12 User’s Manual
Optional Devices
Memory expansion
You can install additional memory in the computer’s memory module socket
to increase the amount of RAM. This section describes how to install and
remove a memory module.
If you install a memory module that is not compatible with the computer, a
beep will sound when you turn on the power. If the incompatible module is
installed in slot A, there will be a long beep (1 second) followed by one
short beep (0.5 seconds), while if the incompatible module is in slot B, there
will be a long beep followed by two short beeps. In the event both modules
are incompatible, there will be a long beep followed by one short beep, a
pause, and then a long beep followed by two short beeps. In all instances
you should shut down the computer and remove the incompatible
module(s).
■ Place a mat beneath the computer to ensure that you do not scratch lid
when replacing the memory module - you must ensure that this mat
does not generate or hold a static electric charge.
■ When you install or remove a memory module, ensure that you do not
touch any other internal areas of the computer.
■ Use only memory modules approved by TOSHIBA.
■ Do not try to install or remove a memory module under the following
conditions as you can damage the computer and/or the module, and
you risk losing data:
a. The computer is turned on.
b. The computer was shut down using either Standby Mode or
Hibernation Mode.
■ Some memory modules can be physically installed but are not
compatible with the computer. In this case, the computer will issue a
warning. When you turn on the power, a series of short beeps will
sound in the pattern of one, three, three, one. Shut down the power and
remove the incompatible module.
■ Be careful not to let screws or other foreign matter fall into the
computer. It could cause malfunction or electric shock.
■ Expansion memory is a precision electronic component that may be
fatally damaged by static electricity. Since the human body can store a
static electric charge, you must ensure that you take steps to remove
this charge before you install an expansion memory module. To
discharge your body’s static electric charge, you can simply touch any
earthed object close to you with bare hands, or, more preferably, use a
a grounded ESD wrist-band.
Use a point size 0 Phillips screwdriver to remove and fasten the screws.
Use of an incorrect screwdriver can damage the screw heads.