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Full Discussion: cmos check sums
Top Forums UNIX for Dummies Questions & Answers cmos check sums Post 2128 by mib on Sunday 22nd of April 2001 08:16:08 AM
Old 04-22-2001
The reason is your computer forgets its CMOS settings. During the boot-up process or POST (Power-On Self Test) a checksum is generated by the BIOS from the CMOS and compared to the one saved the last time the CMOS Setup was run or the BIOS defaults were loaded. If the two numbers don't agree it is an indication that the data in the CMOS has been corrupted. and a checksum error is issued by the BIOS.

Reason:
A bad battery.
A battery that has become discharged (the computer has been off a very long time).
A disconnected battery.
Static electricity.
Grounding the CMOS circuitry.
A bad motherboard.
A bad real-time clock.


A simple solution you can try:
change the CMOS battery.

Write down all of the settings from the various setup menus.
Power off your PC.
Open the case and locate the battery on the motherboard.
Obtain a replacement battery from a local or online computer parts dealer.
Remove the old battery and replace it with the new one.
Replace the case and power on the PC.
Enter your PC's setup mode.
Reenter the settings you have written down from the various setup menus.


HTH
 

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XAPM(1) 																   XAPM(1)

NAME
xapm - display Advanced Power Management (APM) BIOS information SYNOPSIS
xapm [ ... ] DESCRIPTION
xapm puts up an X window that displays the remaining battery life. The left side of the window contains a printed time or percentage; the right side of the window contains a bar indicating the percentage. Clicking on the left side of the window will toggle the display between time and percentage. OPTIONS AND RESOURCES
In addition to standard Xt options, the following options are available: -V Print the program version number and exit. -highcolor color The color of the bar when the battery percentage is above highvalue. Defaults to "green". (*highColor) -lowcolor color The color of the bar when the battery percentage is between lowvalue and highvalue. Defaults to "yellow". (*lowColor) -criticalcolor color The color of the bar when the battery percentage is below lowvalue. Defaults to "red". This color is also used to flash the alphanumeric part of the display when the power status is critical. (*criticalCOlor) -highvalue highvalue Set highvalue. The default is 50. (*highValue) -lowvalue lowvalue Set lowvalue. The default is 10. (*lowValue) -chargingcolor color The color of the printed display when charging. The default is "blue". Use -foreground to change the color used when on battery power. (*chargingColor) -delay delay Sets the number of seconds delay between each update. The default is 1. (*delay) -percent Display percentage on startup, instead of time remaining. (*percent, boolean) -percentauto Swap automatically between displaying percentage and displaying the time remaining. When on ac power, display percentage, when on battery power, display the time remaining. BUGS
There is no way to inhibit the alphanumeric display or the bar display. When the battery percentage is low, using a bright color to warn you of impending doom may be futile because the bar is too short. Because of the form widget's desire to maintain proportions, dynamic resizing of the window may not do what you want it to do. FILES
/proc/apm AUTHOR
This program was written by Rik Faith (faith@cs.unc.edu) and may be freely distributed under the terms of the GNU General Public License. There is ABSOLUTELY NO WARRANTY for this program. The current maintainer is Avery Pennarun (apenwarr@worldvisions.ca). SEE ALSO
apm(1), apmd(8). January 2004 XAPM(1)
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