4 Replacement Procedures 4.1 General
Before You Begin
Before you begin to disassembly the computer, keep in mind the precautions and advice in
this section. Always begin disassembly by removing the AC adapter and battery pack.
Remove the optional parts and accessories as well. The procedures for removing the batteries
will be explained later.
Disassemble the computer only when an abnormality has occurred.
Use only the recommended tools.
To run and store the computer, be sure to prepare a working environment that is free from:
 Dust and contaminants
 Static electricity
 Extremely high or low temperatures and extremely high humidity
Run the diagnostic tests explained in Chapter 2 of this manual to identify the FRU that has
probably caused the system failure.
Perform only the required machine operations. Use only the disassembly and reinstallation
procedures described in this manual.
Place the removed components in a safe place away from the computer so that they are not
damaged or get in the way of you doing your work.
Normally, a number of screws need to be removed or replaced during disassembling. Place
the removed screws in a safe place so that you can easily find the right screws for the right
components.
When assembling the computer, use the specified screws to fasten the parts to the specified
locations. See the appropriate explanations and figures for screw sizes.
To avoid personal injury, use care to handle components that have sharp edges or corners.
After you have replaced a FRU, check that the FRU works correctly to ensure normal
computer operation.
4-4 Qosmio F40/F45 Maintenance Manual
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