52 Chapter 3General InformationBefore You BeginBefore proceeding with the disassembly procedure, make sure that you do the following:1. Turn off the power to the system and all peripherals.2. Unplug the AC adapter and all power and signal cables from the system.3. Remove the battery pack.NOTE: The screws used to secure bottom case and upper case are more than one type. Please group sametype of screw together as you disassemble the system for service purpose. The image below is for yourreference. Please pay attention to the explanation below.The screws that secure heatsink cover, MIni PCI cover and HDD cover are with the covers. There is no needto worry about mix them up. However, please notice that you have to group the screws on the followinglocations together. There are twenty screws holding the bottom case to upper case but some screws are insidethe system. You may have to remove the HDD, the heatsink cover to see these screws. Mini PCI cover herealso called RAM/Wireless cover.Screw Type Location QuantityM2.5*6(Part number: 86.T23V7.010)Bottom case and IO bezel(hightlight with yellow circle)14IO Bezel Batterydownload service manual and resetter printer at http://printer1.blogspot.com