Checking the backup battery
Do the following:
1.
Power off the computer, and unplug the ac adapter from it.
2.
Turn the computer upside down.
3.
Remove the battery pack (see “1010 Battery pack” on page 85).
4.
Remove the backup battery (see “1100 Backup battery” on page 103).
5.
Measure the voltage of the backup battery. See the following figure.
Red (+)
Black (-)
Wire
Voltage (V dc)
Red
+2.5 to +3.2
Black
Ground
v
If the voltage is correct, replace the system board.
v
If the voltage is not correct, replace the backup battery.
v
If the backup battery discharges quickly after replacement, replace the system
board.
General checkout
53
Summary of Contents for 2516AEU
Page 1: ...ThinkPad T410 and T410i Hardware Maintenance Manual ...
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Page 129: ...Table 26 Removal steps of LCD unit continued 11 Removing and replacing a FRU 121 ...
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