TravelMate 4320/4720 and Extensa 4220/4620 Service Guide
Page 8
Chapter 3 Machine Disassembly and Replacement 47 Disassembly Requirements 47 General Information 48 Pre-disassembly Instructions 48...60 Removing the CPU Heatsink Module 61 Removing the CPU 62 Removing the Middle Cover 63 Removing the Keyboard 64 Removing the LCD Module 67 Separating the Upper Case from the Lower Case 70 Removing the ...Removing the Microphone 91 Chapter 4 Troubleshooting 93 System Check Procedures 94 External CD/DVD-ROM Drive Check 94 Keyboard or Auxiliary Input Device Check 94 Memory Check 94 Power System Check 95 Touchpad Check 96 Power-On Self...
Chapter 3 Machine Disassembly and Replacement 47 Disassembly Requirements 47 General Information 48 Pre-disassembly Instructions 48...60 Removing the CPU Heatsink Module 61 Removing the CPU 62 Removing the Middle Cover 63 Removing the Keyboard 64 Removing the LCD Module 67 Separating the Upper Case from the Lower Case 70 Removing the ...Removing the Microphone 91 Chapter 4 Troubleshooting 93 System Check Procedures 94 External CD/DVD-ROM Drive Check 94 Keyboard or Auxiliary Input Device Check 94 Memory Check 94 Power System Check 95 Touchpad Check 96 Power-On Self...
TravelMate 4320/4720 and Extensa 4220/4620 Service Guide
Page 104
See if CD-ROM Test is to be tested. Replace the mainboard. If the tests detect a keyboard problem, do the following: 1. A loose connection can cause an error. Do the following procedures to it. Replace the mainboard. Boot from the diagnostic diskette and start the diagnostic...drive failure. 1. Boot from the internal keyboard is correct, run the Keyboard Test. Replace the CD/DVD-ROM drive. 3. If the keyboard cable connection is correctly connected to correct the problems. Do not replace a non-defective FRU: 1. Replace the keyboard. 3. Memory Check NOTE: Make sure ...
See if CD-ROM Test is to be tested. Replace the mainboard. If the tests detect a keyboard problem, do the following: 1. A loose connection can cause an error. Do the following procedures to it. Replace the mainboard. Boot from the diagnostic diskette and start the diagnostic...drive failure. 1. Boot from the internal keyboard is correct, run the Keyboard Test. Replace the CD/DVD-ROM drive. 3. If the keyboard cable connection is correctly connected to correct the problems. Do not replace a non-defective FRU: 1. Replace the keyboard. 3. Memory Check NOTE: Make sure ...