Dell Latitude XPi Reference Guide - Page 65

3. Reboot the computer by pressing . During the boot routine, do the Num Lock, Caps Lock, and Scroll Lock indicators on the external keyboard flash momentarily? Yes. Continue to step 4. No. You may have a defective keyboard port fuse. Go to step 7. 4. Does the computer recognize the external keyboard or keypad? Use the external keyboard or keypad to type some characters. Do they appear on the display? Yes. The problem is resolved. No. Continue to step 5. 5. Turn off the computer, and disconnect the external keyboard or keypad from the computer. 6. Reboot the computer by pressing . Is the computer recognizing the built-in keyboard? Allow one minute for the computer to initialize its components. Then use the computer's built-in keyboard to type some characters. Do the characters appear on the display? Yes. The external keyboard may be defective. Run the Keyboard Test Group in the Dell diagnostics. (See Chapter 4, "Running the Dell Diagnostics," for instructions.) If you cannot isolate the problem after running the diagnostics, call Dell for technical assistance. (See Chapter 5, "Getting Help," for instructions.) No. The computer's keyboard controller on the system board may be defective. Run the Keyboard Controller Test in the Dell diagnostics. (See Chapter 4, "Running the Dell Diagnostics," for instructions.) If you cannot isolate the problem after running the diagnostics, call Dell for technical assistance. (See Chapter 5, "Getting Help," for instructions.) 7. Call Dell for technical assistance. See Chapter 5, "Getting Help," for instructions. Troubleshooting Memory During POST, the computer checks the computer's memory, and then writes to and reads from the number of available bytes to ensure proper operation. (The computer counts the bytes and displays the count on the display. Pressing the interrupts this count and moves the computer to the next phase of POST.) If the memory count displayed is less than the amount installed, or if the computer fails during the count, make a copy of the Diagnostics Checklist found in Chapter 5 and fill it out as you complete the following procedure. NOTE: Before you begin this procedure, make sure that the SYSTEM SWITCH option in the System Setup program is set to ON/OFF. For instructions, see "Using the System Setup Program" in Chapter 2. 1. Reboot the computer. Does the random-access memory (RAM) count displayed correctly match the actual amount of memory installed in the computer? Yes. The computer needed to update the memory; the memory check phase is now OK. No. Continue to step 2. 2. Turn off the computer and reseat (remove and reinstall) any installed memory modules in your computer. Loose or disconnected memory modules may cause intermittent memory problems. Removing and reinstalling, or reseating, memory modules often corrects the problem. To remove a memory module, carefully spread apart the inner metal tabs of the memory module socket just far enough for the memory module to disengage from the socket (the module should pop up slightly). Then lift the memory module away from the socket. To reinstall a memory module, align the memory module's edge connector with the slot in the center of the memory module socket. Press the memory module's edge connector firmly into the socket. Pivot the memory module down until it clicks into place. If you do not hear a sharp click, remove the memory module and reinstall it. Troubleshooting Your Computer 3-25