4.1 General
This section explains how to disassemble the computer and install Field Replaceable Units
(FRUs). It may not be necessary to remove all FRUs in order to replace one. The chart
below is a guide to which FRUs need to be removed in order to remove others. Start by
disconnecting the AC adapter and removing the battery pack, then follow the lines on the
chart to determine which FRU to remove in order to repair another one.
❏ Battery Pack
❏ Optional Memory Card
❏ Optional PCMCIA Card
❏ Top Cover Keyboard
❏ Hard Disk Drive LED Board
❏ RTC Battery, Backup battery
❏ Accupoint Control Button
❏ System Board
❏ Power Supply Board
❏ FL Inverter Board
❏ Monochrome LCD Display (T3400) FL
❏ TFT Color LCD Display (T3400CT) FL Unit
Before Beginning
Look over the procedures in this section before disassembling the computer. Become familiar
with disassembly and reassembly steps.
1. Do not disassemble the computer unless it is operating abnormally.
2. Use only correct and approved tools.
3. Make sure the working environment is free from the following elements whether
using or storing the computer:
❑ Dust and contaminates
❑ Static electricity
❑ Extreme heat, cold and humidity
4. Verify the FRU being replaced is causing abnormal operation by performing
necessary diagnostics tests.
T3400, T3400CT
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