Dell Precision M70 Service Manual - Page 12

Back to Contents Page Microprocessor Module Dell Precision™ M70 Service Manual Removing the Microprocessor Module CAUTION: Before performing the following procedures, read the safety instructions in your Product Information Guide. NOTICE: 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. NOTICE: Do not touch the microprocessor die. Press and hold the microprocessor down on the substrate on which the die is mounted while turning the cam screw to prevent intermittent contact between the cam screw and microprocessor. NOTICE: To avoid damage to the microprocessor, hold the screwdriver so that it is perpendicular to the microprocessor when turning the cam screw. 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the display assembly. 3. Remove the keyboard. 4. Remove the palm rest. NOTICE: To ensure maximum cooling for the microprocessor, do not touch the heat transfer areas on the microprocessor thermal-cooling assembly. The oils in your skin reduce the heat transfer capability of the thermal pads. 5. Remove the microprocessor thermal-cooling assembly. 6. Loosen the ZIF socket holding the microprocessor. To loosen the ZIF socket, use a small, flat- blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until it comes to the cam stop. NOTICE: When removing the microprocessor module, pull the module straight up. Be careful not to bend the pins on the microprocessor module. 1 ZIF-socket cam screw 2 pin-1 corner 7. Lift out the microprocessor module. Installing the Microprocessor Module