4: Maintenance, Service and Troubleshooting
62
Problem Solving
Keep a note of what happens when you carry out the checks in this
chapter. If the checks do not help, turn to page 70 for what to do
next.
Computer
The green power light does not come on when you switch on
the computer.
• Is your computer set up as shown on the “Setting Up Your New
Computer” card?
• Is your computer switched on at the mains and at the computer?
• Is the fuse in the plug blown? Replace the fuse (see page 3).
• Does the mains supply work? Try another item of equipment in
the same socket.
WARNING:
A blown fuse can be a sign that connections are incorrect or that the wiring in the
plug is wrong. A fuse can also blow if the computer overheats: check that nothing
covers the ventilation holes on the back panel.
Keyboard
Nothing happens when you type on the keyboard.
• Is your system set up correctly as shown on the “Setting Up Your
New Computer”card?
• 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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