• They do not easily come loose, even with shock or vibration.
• They are harder to tighten.
Do the following when you service the computer:
• Keep the screw kit in your tool bag. For the part number of the screw kit, go to:
https://support.lenovo.com/partslookup
• It is recommended to use new screws.
• It is recommended to use each screw only once.
Tighten screws as follows:
•
Plastic to plastic
Turn an additional angle of 90 degrees after the screw head touches the surface of the plastic part.
•
Logic card to plastic
Turn an additional angle of 180 degrees after the screw head touches the surface of the logic card.
Notes:
• Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you
have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table
for each step.
• Ensure torque screwdrivers are calibrated correctly following country specifications.
Retaining serial numbers
This topic provides instructions on the following:
• “Restoring the serial number of the system unit” on page 58
• “Retaining the UUID” on page 59
Restoring the serial number of the system unit
When the computer was manufactured, the EEPROM on the system board was loaded with the serial
numbers of the system and all major components. These numbers need to remain the same throughout the
life of the computer.
If you replace the system board, you must restore the serial number of the system unit to its original value.
58
T495 Hardware Maintenance Manual
Summary of Contents for ThinkPad T495
Page 1: ...T495 Hardware Maintenance Manual ...
Page 6: ...iv T495 Hardware Maintenance Manual ...
Page 11: ...DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 5 ...
Page 12: ...DANGER 6 T495 Hardware Maintenance Manual ...
Page 13: ...PERIGO Chapter 1 Safety information 7 ...
Page 14: ...PERIGO PERIGO PERIGO PERIGO 8 T495 Hardware Maintenance Manual ...
Page 15: ...PERIGO PERIGO PERIGO DANGER DANGER Chapter 1 Safety information 9 ...
Page 16: ...DANGER DANGER DANGER DANGER DANGER 10 T495 Hardware Maintenance Manual ...
Page 17: ...DANGER VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...
Page 18: ...VORSICHT VORSICHT VORSICHT VORSICHT 12 T495 Hardware Maintenance Manual ...
Page 19: ...Chapter 1 Safety information 13 ...
Page 20: ...14 T495 Hardware Maintenance Manual ...
Page 21: ...Chapter 1 Safety information 15 ...
Page 22: ...16 T495 Hardware Maintenance Manual ...
Page 23: ...Chapter 1 Safety information 17 ...
Page 24: ...18 T495 Hardware Maintenance Manual ...
Page 25: ...Chapter 1 Safety information 19 ...
Page 26: ...20 T495 Hardware Maintenance Manual ...
Page 30: ...24 T495 Hardware Maintenance Manual ...
Page 48: ...b LCD assembly 42 T495 Hardware Maintenance Manual ...
Page 70: ...c d 64 T495 Hardware Maintenance Manual ...
Page 107: ......
Page 108: ...Part Number SP40G76812 Printed in China 1P P N SP40G76812 ...
Page 109: ... 1PSP40G76812 ...