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1 ZIF-socket cam screw 2 ZIF socket CAUTION: To ensure maximum cooling for the processor, do not touch the heat transfer areas on the processor thermal-cooling assembly. The oils in your skin can reduce the heat transfer capability of the thermal pads. CAUTION: When removing the processor module, pull the module straight up. Be careful not to bend the pins on the processor module. 1. Follow the instructions in Before You Begin. 2. Align the pin-1 corner of the processor module with the pin-1 corner of the ZIF socket, then insert the processor module. When the processor module is properly seated, all four corners are aligned at the same height. If one or more corners of the module are higher than the others, the module is not seated properly. 3. Tighten the ZIF socket by turning the cam screw clockwise to secure the processor module to the system board. 4. Replace the processor heat sink (see Replacing the Processor Heat Sink). Back to Contents Page NOTE: If a new processor is installed, you will receive a new thermal-cooling assembly, which will include an affixed thermal pad, or you will receive a new thermal pad along with documentation to illustrate proper installation. NOTE: The pin-1 corner of the processor module has a triangle that aligns with the triangle on the pin-1 corner of the ZIF socket. 1 ZIF-socket cam screw 2 ZIF socket 3 pin-1 corner CAUTION: To avoid damage to the processor, hold the screwdriver so that it is perpendicular to the processor when turning the cam screw. Back to Contents Page Processor Heat Sink Dell Studio™ 1555 Service Manual Removing the Processor Heat Sink Replacing the Processor Heat Sink Removing the Processor Heat Sink 1. Follow the instructions in Before You Begin. 2. Remove the optical drive (see Removing the Optical Drive). 3. Disconnect the ExpressCard cables from the respective connectors on the system board (see Removing the ExpressCard Board). 4. Disconnect the AC adapter connector cable, USB cable, fan cable, and the subwoofer cable from the system board (see Removing the System Board Assembly). 5. Remove the six screws that secure the system board to the computer base. 6. Turn the system board over. 7. In sequential order (indicated on the processor heat sink), loosen the four captive screws on the thermal-cooling assembly processor cover. 8. Lift the processor heat sink off the computer. Replacing the Processor Heat Sink WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at WARNING: If you remove the processor heat sink from the computer when the heat sink is hot, do not touch the metal housing of the processor heat sink. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer. CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell™ is not covered by your warranty. CAUTION: To help prevent damage to the system board, remove the main battery (see Before Working Inside Your Computer) before working inside the computer. 1 captive screws (4) 2 processor heat sink 1. Align the four captive screws on the processor thermal-cooling assembly processor cover with the screw holes on the system board and tighten the screws in sequential order. 2. Replace the system board to the computer base. 3. Replace the six screws that secure the system board to the computer base. 4. Connect the AC adapter connector cable, USB cable, fan cable, and the subwoofer cable to the system board (see Replacing the System Board Assembly). 5. Connect the ExpressCard cables back to their respective connectors on the system board (see Replacing the ExpressCard Board). 6. Replace the optical drive (see Replacing the Optical Drive). 7. Slide the battery into the bay until it clicks into place. Back to Contents Page NOTE: The original thermal pad can be reused if the original processor and heat sink are reinstalled together. If either the processor or heat sink is replaced, use the thermal pad provided in the kit to ensure that thermal conductivity is achieved. NOTE: This procedure assumes that you have already removed the processor heat sink and are ready to replace it. Back to Contents Page Display Dell Studio™ 1555 Service Manual Display Assembly Display Bezel Display Panel Display Hinges Display Assembly Removing the Display Assembly 1. Follow the instructions in Before You Begin. 2. Remove the base cover (see Removing the Base Cover). 3. Disconnect the antenna cables from the Mini-Card(s). 4. Lift the antenna cables from the securing tabs and release them from the routing channel. 5. Remove the two screws securing the display assembly from the bottom of the computer. 6. Remove the center control cover ...