Toshiba Satellite 1955 Series Resource Manual page 23

Problems when you turn on the computer
These problems may occur when you turn on the power.
The computer will not start.
Make sure you attached the AC adapter and power cable
properly or installed a charged battery.
Press and hold down the power button for a few seconds.
If you are using the AC adapter, check that the wall outlet is
working by plugging in another device, such as a lamp.
The computer starts but, when you press a key, nothing
happens.
You are probably in Stand By mode and have a software or
resource conflict. When this happens, turning the power on
returns you to the problem instead of restarting the system.
To clear the condition, press
Clearing the condition may get the computer running, but it
won't solve a resource conflict. Read the documentation that
came with the conflicting device.
The keyboard produces unexpected characters.
A keypad overlay may be on. If the numeric keypad or cursor
control light is on, press
the cursor control light or press
turn off the numeric keypad light.
If the problem occurs when both the keypad overlays are off,
make sure the software you are using is not remapping the
keyboard. Refer to the software's documentation and check
that the program does not assign different meanings to any of
the keys.
Display problems
Here are some typical display problems and their solutions:
The display is blank.
Display Auto Off may be in effect. Press any key to activate
the screen.
You may have activated the instant password feature by
pressing and simultaneously. If you have registered a
Fn F1
If something goes wrong
, , and
Ctrl Alt
and simultaneously to turn off
Fn F10
and
Fn F11
simultaneously.
Del
simultaneously to
23