Acer Aspire T690 Service Manual page 51

2-2. Disconnect the USB and Front LED ASSY cables.
Front LED ASSY cable
Card-reader Cable
2-3 . Disconnect the PA and PD power-cable from the MB connector.
PA power-connector
2-4 . Disconnect the P1 power-cable and ODD data cable from the MB connector.
P1 power-cable
Standard Disassembly Process
PD power-connector
USB Cable
ODD data cable