Fujitsu Lifebook E4010D - Service/Maintenance/Disassembly Manual

[peterpost]

I could only find an user manual for replacing simple things like the hard drive and an unofficial disassembly video (https://www.youtube.com/watch?v=TjKAKe4a0G0).

However, I need to replace the CMOS/RTC battery, as I get:

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ERROR 0271: Check date and time settings
ERROR 0251: System CMOS checksum bad - default configuration used