IBM ThinkPad 340 Series Hardware Maintenance Manual page 195

Top System Board (Bottom View)
▌1▐ Inverter Card Connector
▌2▐ Power Jack
▌3▐ Power Switch
▌4▐ Parallel/Diskette Drive Connector
▌5▐ Microphone-In Jack
▌6▐ Line-In Jack
▌7▐ Headphone-/Speaker-Out Jack
▌8▐ Standby Battery Connector
▌9▐ Battery Pack Connector
▌10▐ Board-to-Board Connector
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