5: Technical Information
Problem Solving
Keep a note of what happens when you carry out the checks in this
chapter.
Computer
The blue power light does not come on when you switch on the
computer.
Is your computer set up as shown on the Quick Start Guide?
Is your computer switched on at the mains and at the computer?
Is the fuse in the plug blown? Replace the fuse.
Does the mains supply work? Try another item of equipment in the
same socket.
WARNING:
A blown fuse can be a sign that a connection, or the wiring in the plug
is incorrect. A fuse can also blow if the computer overheats: check
that nothing covers the ventilation holes on the back panel.
The blue LED is flashing or has changed colour and/or there is no
display.
• This will probably mean that your computer is in sleep mode.
Keyboard
Nothing happens when you type on the keyboard.
Is your system set up correctly as shown on the Quick Start Guide?
Is your keyboard correctly plugged into the keyboard connector at
the rear of the computer?
Are you using an application? Press
<Num Lock>. If the <Num Lock>
indicator light comes on, the computer is probably busy performing
a time consuming task. If the light does not come on, you may need
to close down the application by pressing
<Ctrl/Alt/Del>.
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