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Solving Problems: Dell OptiPlex 745 User's Guide
Ensure that you are connected to the Internet — Ensure that you have subscribed
to an Internet provider. With the Outlook Express e-mail program open, click File. If
Work Offline has a checkmark next to it, click the checkmark to remove it and connect to
the Internet. For help, contact your Internet service provider.
Keyboard Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions located in the Product Information Guide.
Check the keyboard cable —
● Ensure that the keyboard cable is firmly connected to the computer.
● Shut down the computer, reconnect the keyboard cable as shown in the Quick
Reference Guide for your computer, and then restart the computer.
● Check the cable connector for bent or broken pins and for damaged or frayed
cables. Straighten bent pins.
● Remove keyboard extension cables and connect the keyboard directly to the
computer.
Test the keyboard — Connect a properly working keyboard to the computer, and try
using the keyboard. If the new keyboard works, the original keyboard is faulty.
Run the Dell Diagnostics — See
Dell Diagnostics.
Check for software and hardware conflicts — see
Resolving Software and Hardware
Incompatibilities.
Fan Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety
instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the
electrical outlet before opening the cover.
NOTICE: To prevent static damage to components inside your computer, discharge static
electricity from your body before you touch any of your computer's electronic components. You
can do so by touching an unpainted metal surface on the computer.
http://support.dell.com/support/edocs/systems/op745/en/UG_en/solving.htm (6 of 18) [10/19/2007 9:39:12 AM]