Dell Studio 1435 Service Manual page 13

When the processor is correctly seated, all four corners are aligned at the same height. If one or more corners of the processor are higher than the
others, the processor is not seated correctly.
NOTICE: To prevent intermittent contact between the ZIF-socket cam screw and the processor when removing or replacing the processor, press to
apply slight pressure to the center of the processor while turning the cam screw.
2. Tighten the ZIF socket by turning the cam screw clockwise to secure the processor to the system board.
3. Peel the backing off the thermal cooling pad and adhere the pad to the portion of the processor heat sink that covers the processor.
4. Replace the processor heat sink (see
5. Replace the fan (Replacing the
6. Replace the base cover (see
7. Slide the battery into the bay until it clicks into place.
8. Update the BIOS using a flash BIOS-update program CD. See
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Replacing the Processor Heat
Fan).
Replacing the Base Cover).
(Flashing the
Sink).
BIOS).