Acer Extensa 500 Service Manual

Also see for Extensa 500: User guide System guide

Contents

Acer Extensa 500 Service Manual Manual pdf 75 page image

Chapter 4 752. Replace the CD-ROM drive.3. Replace the system board.Keyboard or Auxiliary Input Device CheckRemove the external keyboard if the internal keyboard is to be tested.If the internal keyboard does not work or an unexpected character appears,make sure that the flexible cable extending from the keyboard is correctlyseated in the connector on the system board.If the keyboard cable connection is correct, run the Keyboard Test. See“Running the Diagnostics” for details.If the tests detect a keyboard problem, do the following one at a time tocorrect the problem. Do not replace a non-defective FRU:1. Reconnect the keyboard cables.2. Replace the keyboard.3. Replace the system board.The following auxiliary input devices are supported by this computer:q Numeric keypadq External keyboardIf any of these devices do not work, reconnect the cable connector andrepeat the failing operation.Memory CheckMemory errors might stop system operations, show error messages on thescreen, or hang the system.1. Boot from the diagnostics diskette and start the PQA program (pleaserefer to “Running PQA Diagnostics Program”.2. Go to the diagnostic memory in the test items.3. Press F2 in the test items.4. Follow the instructions in the message window.Note:Make sure that the DIMM is fully installed into the connector. Aloose connection can cause an error.Power System CheckTo verify the symptom of the problem, power on the computer using each ofthe following power sources:1. Remove the battery pack.