36 Solving Problemsw w w . d e l l . c o m | s u p p o r t . d e l l . c o mUnexpected CharactersPress to disable the numeric keypad. Verify that the numbers locklight is not lit.Drive ProblemsIf you cannot play a CDHigh-speed CD drive vibration is normal and may cause noise. This noisedoes not indicate a defect with the drive or the CD.CH E C K T H E E X T E R N A L K E Y B O A R D1 Turn off the computer, wait 1 minute, and turn it on again.2 Verify that the numbers, capitals, and scroll lock lights on the keyboard blinkduring the boot routine.3 From the Windows® desktop, click the Start button, point to Programs, pointto Accessories, and click Notepad.4 Type some characters on the external keyboard and verify that they appear onthe display.If you cannot verify these steps, you may have a defective external keyboard.TO V E R I F Y T H A T T H E P R O B L E M I S W I T H T H E E X T E R N A L K E Y B O A R D ,C H E C K T H E I N T E G R A T E D K E Y B O A R D1 Turn off the computer.2 Disconnect the external keyboard.3 Turn on the computer.4 From the Windows desktop, click the Start button, point to Programs, pointto Accessories, and click Notepad.5 Type some characters on the integrated keyboard and verify that they appearon the display.If the characters appear now but did not with the external keyboard, you mayhave a defective external keyboard. Contact Dell (see page 70).