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The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell
battery lasts forever. If the coin-cell battery fails, the date and time information is lost. An error message is
displayed when you turn on the computer.
Replacement procedure
1. Remove the computer cover. See "Computer cover" on page 67.
2. Remove the hard disk drive and hard disk drive bracket, if any. See "Hard disk drive and hard disk drive
bracket" on page 69.
3. Remove the system fan. See "System fan" on page 72.
4. Disengage the latch.
5. Remove the coin-cell battery.
6. Install the coin-cell battery.
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M90q Hardware Maintenance Manual
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