IBM ThinkPad 340 Series Hardware Maintenance Manual page 180

battery, fold the cable and place the standby battery
in the space beside the battery pack connector.
Safety Notice 6: Translation on page 12
To avoid shock, do not remove the plastic cover that
surrounds the lower portion of the inverter card.
▌23▐
Remove the inverter card from the top system
board, shown in the figure on page 164.
▌24▐
Remove the infrared window from the inverter
card, shown in the figure on page 164.
Removing Bottom System Board and Modem
▌25▐
Remove the screw (BL) holding in the bottom
system board, shown in the figure on page 165.
▌26▐
Remove the two screws (BC) located on the
docking connector shown in the figure on page
165.
Replacement: When you replace these screws,
use the following order:
1. Install one docking connector screw.
2. Install the bottom system board screw (from
step ▌25▐).
3. Install the other docking connector screw.
Safety Notice 4: Translation on page 10
The backup battery is a lithium battery and can cause
a fire, explosion or severe burn. Do not recharge it,
remove its polarized connector, disassemble it, heat it
above 100 degrees C (212 degrees F), incinerate it, or
expose its cell contents to water. Dispose of the
battery as required by local ordinances or regulations.
Use of an incorrect battery can result in ignition or
explosion of the battery. Replacement batteries can
be ordered from IBM or IBM Authorized Dealers.
▌27▐
Remove the bottom system board and the
attached modem shown in the figure on page
165.
To remove the bottom system board, push in lightly
on the modem connector to free it from the base.
Make sure that the modem connector has been
freed from its slot in the base before removing the
bottom system board.
Replacement: When you replace the bottom
system board, keep the speaker cable toward the
rear of the computer. Do not leave it folded under
the bottom system board. Reuse the rubber
spacers.
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IBM Mobile Systems HMM