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Anleitung Zusammenfassung
3. Remove the keyboard. 4. Remove the display assembly. 5. Remove the palm rest. 6. Remove the microprocessor thermal-cooling assembly. 7. To loosen the ZIF socket, use a small flat-blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until you cannot turn the screw any further. 8. Lift the microprocessor module from the system board. Installing the Microprocessor Module CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the 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 processor 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. 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. NOTICE: When removing the microprocessor module, pull the module straight up. Be careful not to bend the pins on the microprocessor module. 1 microprocessor 2 ZIF-socket cam screw 3 ZIF socket 4 pin-1 corner NOTE: The ZIF-socket cam screw secures the microprocessor to the system board. Take note of the arrow on the ZIF-socket cam screw. 1. Align the pin-1 corner of the microprocessor module with the pin-1 corner of the ZIF socket, and insert the microprocessor module. When the microprocessor module is correctly 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 correctly. 2. Tighten the ZIF socket by turning the cam screw clockwise until you cannot turn the screw any further to secure the microprocessor module to the system board. 3. Replace the other computer parts you removed earlier in this procedure. 4. Update the BIOS using a flash BIOS update program CD. For instructions on how to flash the BIOS, see "Flashing the BIOS." Back to Contents Page NOTICE: Ensure that the cam lock is in the fully open position before seating the microprocessor module. Seating the microprocessor module properly in the ZIF socket does not require force. NOTICE: A microprocessor module that is not properly seated can result in an intermittent connection or permanent damage to the microprocessor and ZIF socket. NOTE: The pin-1 corner of the microprocessor module has a triangle that aligns with the triangle on the pin-1 corner of the ZIF socket. NOTICE: You must position the microprocessor module correctly in the ZIF socket to avoid permanent damage to the module and the socket. Back to Contents Page Display Assembly and Display Latch Dell Precision™ M20 Service Manual Display Assembly Display Bezel Display Panel Display Latch Display Assembly Removing the Display Assembly 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the center control cover. 3. Remove the keyboard. 4. Open the display approximately 180 degrees so that is lies flat against your work surface. 5. Loosen the captive screw that secures the display cable to the heat sink on the system board. 6. Use the pull-tab to remove the display cable from the display connector on the system board. 7. Remove the four M2.5 x 5-mm screws. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the 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: You must remove the display assembly before you remove the palm rest. NOTE: If a Mini PCI card is installed, remove the two antenna cables from the card and from the routing clips. 1 antenna cables (2) 2 M2.5 x 5-mm screws (4) 3 display 4 captive screw on heat sink 5 display connector on system board 6 pull-tab on display-cable connector 8. Lift the display assembly out of the computer base. Installing the Display Assembly 1. Align the display assembly over the screw holes in the base of the computer. 2. Replace the four M2.5 x 5-mm screws. 3. Route the two antenna cables under the routing clips. 4. Replace the keyboard. 5. Replace the center control cover. Display Bezel Removing the Display Bezel 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the center control cover. 3. Remove the keyboard. 4. Remove the display assembly. 5. Use a plastic scribe to pry the six display bumpers out of the screw holes located on the front of the bezel. 6. Remove the six M2.5 x 5-mm screws...