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Acer M1640 Support Question

Acer M1640 Support Question

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Question posted by aschutz on June 24th, 2012

Cmos Checksum Bad

how can i repair this=

Current Answers

Answer #1: Posted by markempee on July 3rd, 2012 9:12 PM
markempee

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October 28th, 2011

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CMOS checksum bad refers to the failure of the CMOS battery of your computer. The CMOS battery is the lithium battery that maintains the updated time and date of your computer. Try to replace the CMOS battery and check again.

Related Acer M1640 Manual Pages

Service Guide for Aspire M1640 / M3640 / M5640 - Page 1

for more information please refer to http://csd.acer.com.tw PRINTED IN TAIWAN Aspire M5640 Aspire M3640 Aspire M1640 Service Guide Service guide files and updates are available on the AIPG/CSD web;
Service Guide for Aspire M1640 / M3640 / M5640 - Page 2

Date Chapter Updates II Revision History Please refer to the table below for the updates made on Aspire M5640/Aspire M3640/ Aspire M1640 service guide.
Service Guide for Aspire M1640 / M3640 / M5640 - Page 3

.... No part of this manual is sold or licensed "as is subject to the contents hereof and specifically disclaims any warranties of all necessary servicing, repair, and any incidental or consequential damages resulting from any particular purpose. Copyright Copyright © 2007 by any means, electronic, mechanical, magnetic, optical, chemical, manual or...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 5

... for Acer's "global" product offering. In such cases, please contact your regional office MAY have a DIFFERENT part number code to the BASIC CONFIGURATION decided for repair and service of a machine (e.g. V
Service Guide for Aspire M1640 / M3640 / M5640 - Page 6

... Front Panel 9 Aspire M5640 Rear Panel 10 Aspire M3640 Front Panel 11 Aspire M3640 Rear Panel 12 Aspire M1640 Front Panel 13 Aspire M1640 Rear Panel 14 Hardware Specifications and Configurations 15 Power Management Function (ACPI support function 19 Chapter 2 System Utilities 20 Entering Setup 21 Product Information 23 Standard CMOS Features 24 Advanced BIOS Features 27 Integrated...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 10

... and RPL function is optional by service BIOS) BIOS shall auto detect FDD to avoid checksum error when boot I/O Connector Controller: Super I /O Connector 1 PS/2 Keyboard port, 1 PS/2 Mouse port, 1 COM port 1 DVI port (Aspire M1000 series only) 1 HDMI port (Aspire M3000/5000 series only), 1 D-Sub port, 1 RJ45 LAN port, 1 IEEE 1394 port (6 pin...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 11

... Fan connector 1 3 pin System FAN connector with linear circuit 1 24pin + 4pin ATX interface PS3/PS2 SPS connector 1 2*7 pin front panel IO header 1 Jumper for clear CMOS 1 on board buzzer Color management for on all SKU) 1 2*5 pin Intel FPIO spec. Microphone In/ Headphone Out pin connectors 1 serial port 2*5 pin connector (reserve header...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 15

Aspire M5640 Front Panel The computer's front panel consists of the following: Label 1 2 3 4 5 6 7 Description Optical drive Card reader Power and HDD LED Power button Speaker or headphone Microphone jack USB ports 9
Service Guide for Aspire M1640 / M3640 / M5640 - Page 16

Aspire M5640 Rear Panel Label Description 1 Power card socket 2 Voltage selector switch 3 PS/2 keyboard connector 4 COM port 5 Monitor connector 6 USB 2.0 ports 7 Audio port 8 Fan aperture Label Description 9 PS/2 mouse connector 10 HDMI port 11 System Fan connector 12 IEEE 1394 port 13 SPDIF port 14 LAN port 15 Lock Handle 10
Service Guide for Aspire M1640 / M3640 / M5640 - Page 17

Aspire M3640 Front Panel Label 1 2 3 4 5 6 7 8 9 Description USB ports Floppy disk drive Card reader cover Acer Logo Microphone jack Speaker or headphone Optical drive Power button LED module 11
Service Guide for Aspire M1640 / M3640 / M5640 - Page 18

Aspire M3640 Rear Panel Label Description 1 Power card socket 2 Voltage selector switch 3 PS/2 keyboard connector 4 COM port 5 Monitor connector 6 USB 2.0 ports 7 Audio port 8 Fan aperture Label Description 9 PS/2 mouse connector 10 HDMI port 11 System Fan connector 12 IEEE 1394 port 13 SPDIF port 14 LAN port 15 Lock Handle 12
Service Guide for Aspire M1640 / M3640 / M5640 - Page 20

Aspire M1640 Rear Panel Label Description 1 Power card socket 2 Voltage selector switch 3 PS/2 keyboard connector 4 COM port 5 Monitor connector 6 USB 2.0 ports 7 Audio port Label Description 8 Fan aperture 9 PS/2 mouse connector 10 System Fan connector 11 IEEE1394 port 12 SPDIF port 13 LAN port 14 Lock Handle 14
Service Guide for Aspire M1640 / M3640 / M5640 - Page 26

...computer unless you exit Setup. 20 In this case, the system cannot retain configuration values in CMOS. NOTE: If you have saved all open files. The system reboots immediately after you get... most systems. There is not part of the system RAM. The Setup program loads configuration values into the battery-backed nonvolatile memory called CMOS RAM. This memory area is no need to run Setup,...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 28

...password. It allows you to limit access to the system and Setup, or just to CMOS and exit setup Exit Without Saving Abandon all configurations of PCI & PnP ISA resources PC ... peripherals Power Management This setup page includes all the items of the main board Standard CMOS Features This setup page includes all the items in best performance configuration Set Supervisor Password ...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 30

Standard CMOS Setup Select standard CMOS features from the main menu to configure some basic parameters in your system the following screen shows the standard CMOS features menu: 24
Service Guide for Aspire M1640 / M3640 / M5640 - Page 50

... Disabled Spread Spectrum Enabled Enabled KLIJ :Move Enter: Select +/-/:Value F10:Save ESC:Exit F1:General Help F9:Optimized Defauits 44 Options Frequency/Voltage Control CMOS Setup Utility - It is always enabled by system. The following table describes the parameters found in this menu: arameter V core CPU Temperature CPU/SYSTEM FAN...
Service Guide for Aspire M1640 / M3640 / M5640 - Page 54

... Password has higher priority than User Password. Parameter Description Set When this function is selected, the following message Supervisor/User appears at "Security Option" from CMOS Memory. You may also press to abort the selection.
Service Guide for Aspire M1640 / M3640 / M5640 - Page 60

According to the requirement, paste ATI, OS, CPU, HDMI and marketing label by SKU. Aspire M3640 Marketing label for AAC Marketing Label HDMI Label ATI Label OS Label CPU Label 5±0.5m Marketing label for EMEA & AAP 54 Aspire M5640/3640/1640 Standard Disassembly Process Process: Bezel Label 1.
Service Guide for Aspire M1640 / M3640 / M5640 - Page 86

...channel. For whatever reasons a part number change is made, it will not be noted in global configurations of Aspire M5640/3640/1640. Refer to repair or for RMA (Return Merchandise Authorization). NOTE: Please note WHEN ORDERING FRU PARTS, that you the FRU (Field... Unit) List This chapter gives you should check the most up-to order FRU parts for repair and service of customer machines. 80

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