258Chapter 16: Troubleshootingwww.gateway.comPeople are sending you e-mail messages, but you have not receivedany mail■ Click the receive button in your e-mail program.■ Make sure that your account with your Internet service provider (ISP) isset up correctly. Contact your ISP for technical support.KeyboardThe external keyboard does not work■ Make sure that the keyboard cable is plugged in correctly.■ Remove all extension cables and switchboxes.■ Clean the keyboard by using an aerosol can of air with a narrow, straw-likeextension to remove dust and lint trapped under the keys.■ Try a keyboard that you know works to make sure that the keyboard portworks.■ If you spilled liquid in the keyboard, turn off your notebook and unplugthe keyboard. Clean the keyboard and turn it upside down to drain it. Letthe keyboard dry before using it again. If the keyboard does not work afterit dries, you may need to replace it.A keyboard character keeps repeating or you see a “Keyboard stuck”or “Key failure” error message■ Make sure that nothing is resting on the keyboard.■ Make sure that a key is not stuck. Press each key to loosen a key that mightbe stuck, then restart your notebook.MemoryYou see a “Memory error” message■ Make sure that the memory modules are inserted correctly in the memorybay slots. For more information, see “Adding or replacing memory” onpage 237.■ Use PC Doctor or a third-party diagnostic program to help determine if amemory module is failing. For more information, see “Adding or replacingmemory” on page 237.