Inspiron 157000 Series Service Manual

Procedure

Replace the heat sink.
Replace the speakers.
Turn the system board over.
Slide the ports on the system board into the slots on the computer base and place the system board on the computer base.
Connect the speaker cable, I/O-board power cable, and coin-cell battery cable to the system board.
Slide the I/O board cable and status-light board cable into the connector on the system board and close the latches to secure the cables.
Adhere the tape that secures the I/O board cable to the system board.
Close the display and turn the computer over.
Connect the power-adapter port cable and display cable to the system board.