HP Compaq Presario CQ61 Maintenance And Service Manual page 74

Remove the system board:
1. Disconnect the following cables from the system board:
1 Audio board cable
2 Bluetooth module cable (select models only)
3 USB board cable
4 Power connector cable
5 Speaker cable
2. Remove the Phillips PM2.5×6.5 screw that secures the system board to the base enclosure.
Maintenance and Service Guide
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Removal and replacement procedures
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