Toshiba Satellite U840 Maintenance Manual page 137

Replacement Procedures
Figure 4-2-4 Disconnect the Battery power connector FIRST from the main board after
disassembling the Base case before service agent touch in electrical units (SSD/HDD,
Memory module and other parts), then disconnect signal connector from the main board
Satellite U840 Maintenance Manual (960-Q08)
Figure 4-2-3 Disassemble Base case
Battery Signal Connector
Battery Power Connector
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