sometimes my comp start normally but when i restarted it or shutdown the error cmos checksum appear, i have change the lithum battery but its still thesame.. pls help me guys!!!
2007-09-13 06:11:29 · 4 answers · asked by yob f 1 in Computers & Internet ➔ Hardware ➔ Desktops
You know how when you go to BIOS setup then you can change things around. Did you ever wonder how those setting were remembered on the next boot? The CMOS area is the numonic for this special area of your bios flash chip that your BIOS setup can write to save the setup information. The data in this area gets check-summed, meaning a mathmatical algorithm is used on the consecutive data in the entire CMOS region and placed at the end. So next boot the BIOS simply does the algorithm again compares it to the end value. If it is different then the message you have is displayed.
Here are the causes I have seen for corruption in an otherwise good machine.
1.) Vendor add ons that poke into this CMOS region to do low level setup stuff without your BIOS knowing. Like some graphics or IDE windows configuration utilities.
2.) Not clearing out your CMOM memory ( this is a BIOS setup option) prior to making BIOS setup changes. Not all checksum processes are foolproof. For example ( I have seen this case), if you have set something up in BIOS and it happens to create a long CMOS setup string, then you change it to a setup with a smaller one the BIOS may not overwrite or clear the now unused data at the end so the checksum fails.
So before I did anything to your BIOS or the flash chip I would look to see if had any low level "utility" type applications for your hardware running in windows. Don't let them run if you do, they only need to run once usually.
Then I would go to BIOS setup and clear my configuration space (CMOS), allow the system to boot up out of setup using the save setup and boot option (not CTL-ALT-DEL). This will start your CMOS area up new. Kind of a clean up.
Hopefully it will work good for a while after that.
2007-09-13 06:54:36 · answer #1 · answered by Rick A 3 · 0⤊ 0⤋
If the clock on the PC is now at the wrong time, the battery on the motherboard has failed, so the BIOS no longer remembers settings.
Buy and insert new battery (usually a watch type litium one) and then go into bios, set any settings you need to, and that should solve all problems.
2007-09-13 06:29:33 · answer #2 · answered by stu_the_kilted_scot 7 · 0⤊ 0⤋
Looks to me like your computer has a corrupt BIOS. By the specs of your machine though, it is more than likely the manufacturer has discontinued support for it. In any case, just reflash your BIOS with the corresponding one.
Warning: This is a somewhat risky process, if you do not feel comfortable doing it, take it to a service center.
2007-09-13 06:18:47 · answer #3 · answered by TRON 4 · 0⤊ 0⤋
it does sound like cmos battery is lifeless you ought to replace it. you will would desire to set bios defaults and shop after battery replace. why the twin boot ninety 8 and xp fairly with that processor
2016-11-10 08:15:54 · answer #4 · answered by Erika 4 · 0⤊ 0⤋