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Checkout guide
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 77).
4. Remove the backup battery (see "Checking the battery
pack" on page 47).
5. Measure the voltage of the backup battery. See the
following figure.
Red (+)
Black (-)
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.
48
MT1864/1865/2525/2526/2527/2528
Wire
Voltage (V dc)
Red
+2.5 to +3.2
Black
Ground
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