User manual ACER ASPIRE M1800

[. . . ] Wrist grounding straps are available at most electronic component stores. Do not attempt the procedures described in the following sections unless you are a qualified technician. System Board 1-11 1. 4 Memory Upgrade The system board comes with four 72-pin SIMM sockets that support 4-MB and 16-MB single-density SIMMs and 8-MB and 32-MB doubledensity SIMMs. Table 1-4 lists the possible 64-bit memory configurations. Table 1-4 Memory Configurations (64-bit) Bank 0 Bank 1 SIMM-3 4 MB SIMM-4 4 MB 8 MB 4 MB 8 MB 4 MB 8 MB 16 MB 16 MB 4 MB 16 MB 8 MB 16 MB 32 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 4 MB 8 MB 4 MB 4 MB 8 MB 8 MB 16 MB 4 MB 16 MB 8 MB 16 MB 16 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 32 MB 8 MB 4 MB 8 MB 4 MB 8 MB 16 MB 16 MB 4 MB 16 MB 8 MB 16 MB 32 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB Total Memory 8 MB 8 MB 16 MB 16 MB 16 MB 24 MB 24 MB 32 MB 32 MB 32 MB 40 MB 40 MB 48 MB 48 MB 64 MB 64 MB 64 MB 72 MB 72 MB 80 MB 80 MB 96 MB 96 MB 128 MB SIMM-1 4 MB 8 MB 4 MB 4 MB 8 MB 8 MB 16 MB 4 MB 16 MB 8 MB 16 MB 16 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 32 MB SIMM-2 1-12 User's Guide The system also supports 32-bit memory configurations. This feature allows you to install only one SIMM in a bank or in a configuration. Table 1-5 shows the 32-bit configurations. Table 1-5 Memory Configurations (32-bit) Bank 0 Bank 1 SIMM-3 4 MB 8 MB 16 MB 32 MB 4 MB 8 MB 16 MB 32 MB 4 MB 8 MB 16 MB 32 MB 4 MB 8 MB 16 MB 32 MB SIMM-4 Total Memory 4 MB 12 MB 16 MB 24 MB 40 MB 8 MB 20 MB 24 MB 32 MB 48 MB 16 MB 36 MB 40 MB 48 MB 64 MB 32 MB 68 MB 72 MB 80 MB 96 MB SIMM-1 4 MB* 4 MB 4 MB 4 MB 4 MB 8 MB* 8 MB 8 MB 8 MB 8 MB 16 MB* 16 MB 16 MB 16 MB 16 MB 32 MB* 32 MB 32 MB 32 MB 32 MB SIMM-2 4 MB 4 MB 4 MB 4 MB 8 MB 8 MB 8 MB 8 MB 16 MB 16 MB 16 MB 16 MB 32 MB 32 MB 32 MB 32 MB * May also be installed in SIMM-2, SIMM-3, or SIMM-4. System Board 1-13 1. 4. 1 Installing a SIMM Follow these steps to install a SIMM: 1. [. . . ] Carefully slip a SIMM at a 45° angle into a socket making sure that the curved edge indicating the pin 1 of the SIMM matches pin 1 of the socket. A SIMM fits only in one direction. If you slip in a SIMM but would not completely fit, you may have inserted it the wrong way. Gently push the SIMM to a vertical position until the pegs of the socket slip into the holes on the SIMM, and the holding clips lock the SIMM into position. The SIMM should be at a 90° angle when installed. 1 2 Peg Pin 1 Indicator (curved edge) Hole Figure 1-8 Installing a SIMM 1-14 User's Guide 1. 4. 2 Removing a SIMM Follow these steps to remove a SIMM: 1. Press the holding clips on both sides of the SIMM outward to release it. Pull the SIMM out of the socket. Holding Clip 1 3 2 Figure 1-9 Removing a SIMM Always remove SIMMs from the socket labeled SIMM-4, then SIMM-3, and so on. System Board 1-15 1. 4. 3 SIMM Type Selection When selecting SIMMs to install, make sure to take note of the height limitations of the slot board installed in the system. Table 1-6 shows the SIMM height limitations for the different slot boards. Table 1-6 SIMM Height Limitations Slot Board SIMM Height Limit 23. 3 mm 28. 8 mm 21. 8 mm 26. 8 mm Aspire Desktop and AcerBasic Aspire Minitower ID2PN and ID2M IDABN 1-16 User's Guide 1. 4. 4 Reconfiguring the System You must enter Setup after installing or removing SIMMs to reconfigure the system. A memory error message appears, indicating that the total memory does not match the value stored in CMOS. A warning message Press appears indicating an incorrect memory configuration. This section explains the different types of error messages and corresponding corrective measures. There are two general types of error messages: · · Software System 1. 12. 1 Software Error Messages Software error messages are returned by your operating system or application. These messages typically occur 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. 12. 2 System Error Messages A system error message indicates a problem with the computer itself. A message of this type normally appears during the power-on self-test, before the operating system prompt appears. Table 1-9 lists the system error messages. 1-26 User's Guide Table 1-9 System Error Messages Message Action Replace the RTC chip or contact your dealer. Run Setup Check and connect the control cable to the diskette controller. Modify the memory configuration to agree with one of the options in Tables 1-3 or 1-4. Replace the keyboard or contact your dealer. CMOS Battery Error CMOS Checksum Error Display Card Mismatch Diskette Drive Controller Error or Not Installed Diskette Drive Error Diskette Drive A Type Mismatch Diskette Drive B Type Mismatch Equipment Configuration Error Hard disk Controller Error Hard disk 0 Error Hard disk 1 Error Keyboard Error or No Keyboard Connected Keyboard Interface Error System Board 1-27 Table 1-9 System Error Messages (continued) Message Action Check SIMMs on the system board. [. . . ] Modify the memory configuration to agree with one of the options in Tables 1-3 or 1-4. Replace the keyboard or contact your dealer. CMOS Battery Error CMOS Checksum Error Display Card Mismatch Diskette Drive Controller Error or Not Installed Diskette Drive Error Diskette Drive A Type Mismatch Diskette Drive B Type Mismatch Equipment Configuration Error Hard disk Controller Error Hard disk 0 Error Hard disk 1 Error Keyboard Error or No Keyboard Connected Keyboard Interface Error System Board 1-27 Table 1-9 System Error Messages (continued) Message Action Check SIMMs on the system board. Contact your dealer. Memory Error at: MMMM:SSSS:OOO (W:XXXX, R:YYYY) where: M: MB, S: Segment, O: Offset, X/Y: write/read pattern CPU Clock Mismatch Run Setup. + + Onboard Serial Port 1 Conflict Onboard Serial Port 2 Conflict Onboard Parallel Port Conflict Pointing Device Error Pointing Device Interface Error Press + key to continue or + for Setup Real Time Clock Error Check the RTC chip. [. . . ]