User manual ACER ASPIRE M3640

[. . . ] 10. Parallel port COM 2 connector FDD connector COM 1 connector IDE 2 connector 5V power connector IDE 1 connector SIMM sockets ZIF-type CPU socket Voltage regulator with heatsink 11. 19. Second-level cache 1 ID3P LED connector Multifunction connector Real-time clock System BIOS Cache upgrade socket 1 ISA slots PCI slots Keyboard connector Figure 1-1 System Board Layout The heatsink becomes very hot when the system is on. NEVER touch the heatsink with any metal or with your hands. 1 Optional. The system board may come with either an onboard cache or a cache upgrade socket. System Board 1-3 The multifunction connector is 20-pin connector that accommodates the LED and reset cables. [. . . ] Always observe the following precautions before you install a system component. Do not remove a component from its protective packaging until you are ready to install it. Wear a wrist grounding strap and attach it to a metal part of the system unit before handling components. If a wrist strap is not available, maintain contact with the system unit throughout any procedure requiring ESD protection. 1. 3 Pre-installation Instructions Always observe the following before you install a system component: 1. Turn off the system power and all the peripherals connected to the unit before opening it. Open the system according to the instructions in the housing installation manual. Follow the ESD precautions in section 1. 2 before handling a system component. Remove any expansion boards or peripherals that block access to the SIMM sockets or CPU socket. See the following sections for specific instructions on the component you wish to install. Do not attempt the procedures described in the following sections unless you are a qualified service technician. System Board 1-5 1. 4 Installing a CPU Observe the ESD precautions when installing components. See section 1. 2. The system board features a zero-insertion force (ZIF) socket for easy CPU installation. Run Setup to view the new value for total system memory and make a note of it. System Board 1-15 1. 8 Upgrading Cache Memory Observe ESD precautions when components. installing The system board may come with either a standard 256-KB secondlevel asynchronous cache or a cache upgrade socket. See Figure 1-1 for the location of the 256-KB cache and the optional cache upgrade socket. The cache upgrade socket allows you to upgrade the second-level cache. See 1. 5 for the postinstallation instructions. If the board does not have the cache upgrade socket, then the system cache is not upgradable. 1-16 User's Guide 1. 9 Error Messages In the event that you receive an error message, do not continue using the computer. This section describes the different types of error messages and suggests corrective measures. There are two general types of error messages: · · Software System 1. 9. 1 Software Error Messages Software error messages are returned by your operating system or application. These messages typically appear after you boot the operating system or when you run your applications. If you receive this type of message, consult your application or operating system manual for help. 1. 9. 2 System Error Messages A system error message indicates a problem with the computer itself. These messages normally appear during the power-on self-test, before the operating system prompt appears. [. . . ] These messages normally appear during the power-on self-test, before the operating system prompt appears. Table 1-9 lists the system error messages in alphabetical order. System Board 1-17 Table 1-9 System Error Messages Corrective Action Replace battery. Contact your dealer. Error Message Bad CMOS Battery CMOS Checksum Error Diskette Drive Controller Error Diskette Drive Error DRAM Configuration Error Equipment Configuration Error Fixed Disk Controller Error Fixed Disk 0 Error Fixed Disk 1 Error Fixed Disk 0 Extended Type Error Fixed Disk 1 Extended Type Error I/O Parity Error Keyboard Error or No Keyboard Connected Keyboard Interface Error 1-18 User's Guide Table 1-9 System Error Messages (continued) Error Message Corrective Action Unlock the keyboard. Check SIMMs on system board or contact your dealer. Keyboard Locked Memory Error Memory Size Mismatch Serial 1 Conflict Serial 2 Conflict Parallel Port Conflict Pointing Device Error Pointing Device Interface Error Press F1 key to continue or Ctrl-Alt-Esc for Setup Press F1 to Setup or other key to continue Press Esc to turn off NMI, any key to reboot Protected Mode Test Fail RAM BIOS Error Real Time Clock Error Shadow RAM Fail System Memory Address Error System Board 1-19 1. 9. 3 Correcting Error Conditions As a general rule, the "Press F1 to continue" error message is caused by a configuration problem which can be easily corrected. [. . . ]