Cmos Error On Boot
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How To Fix Cmos Checksum Error
Cameras Hassle-Free PC Smart fixes for your PC hassles Home Hardware Troubleshoot a BIOS or CMOS 'Checksum' Error Comments By
Cmos Checksum Error Means
Rick Broida, PCWorld Sep 21, 2011 9:40 AM Reader Robert has an older Emachines desktop that recently developed a problem: "I installed a driver updater tool, and when I deleted it, it did
How To Solve Cmos Checksum Error Default Loaded
something that changed my BIOS. The black screen appears when I boot up and reads: 'System BIOS shadowed. Check time and date settings. System CMOS checksum bad--default configuration used.'" Robert says he's tried contacting both Phoenix Technologies (makers of the BIOS) and Emachines, and neither company could help. (The BIOS dates back to 2003, and the system itself is long out of warranty.) Fortunately, this sounds like cmos checksum failed a pretty easy problem to fix. I don't think the driver-update utility is to blame here, but rather a poorly timed CMOS-battery failure. See, most desktop motherboards have a small battery that supplies power to the BIOS even when the machine is turned off. This battery might last two years or it might last 10, but when it fails, you'll often see an error message like the one above. (Your system will also fail to keep proper time, as the clock is one of the elements powered by that battery.) Most CMOS batteries are standard CR2032 "button" cells, which cost no more than a few bucks at your local drugstore, but check your motherboard documentation just to be safe. Replacing one is usually a two-minute job: pop out the old one, pop in the new one, and you're done. After that, you'll probably need to venture into the BIOS to reset the clock and double-check other system settings (like boot priority). Just be glad this didn't happen to your laptop. Laptops use CMOS batteries just like desktops, but on most models they're difficult--if not impossible--to replace. Which begs the question: After all these years, why haven't laptop manufacturer
WorkSocial MediaSoftwareProgrammingWeb Design & DevelopmentBusinessCareersComputers Online Courses B2B Solutions Shop for Books San Francisco, CA Brr, it´s cold outside Search Submit Learn more with dummies Enter your email to join cmos problem our mailing list for FREE content right to your inbox. Easy! cmos bad Your email Submit RELATED ARTICLES Troubleshoot CMOS Errors on PC Start Up What is the USB ed checksum Type-C Cable? For Seniors: Contact Microsoft Customer Support Finding Large Files on Your PC Troubleshooting Your PC For Dummies, 3rd Edition Load more ComputersPCsTroubleshoot CMOS Errors http://www.pcworld.com/article/240331/troubleshoot_a_bios_or_cmos_checksum_error.html on PC Start Up Troubleshoot CMOS Errors on PC Start Up Related Book Troubleshooting Your PC For Dummies, 3rd Edition By Dan Gookin To troubleshoot your PC when it is experiencing persistent start-up errors, take a look at the words that scroll across the screen on start up to see if the errors say http://www.dummies.com/computers/pcs/troubleshoot-cmos-errors-on-pc-start-up/ anything about CMOS. If so, it may be a dead motherboard battery. Yes, your computer has an internal battery. That battery keeps track of the time while the computer is turned off. On ancient computers, it also maintained something called the CMOS (say "see moss"). So a telltale sign of a CMOS error, and therefore a dead PC battery, was that the word CMOS appeared in the error message. For example: 98304K 162-System Options Not Set 163-Time & Date Not Set The following configuration options were automatically updated: Disk 1: 2428 Mbytes If you are running Unix, you need to configure your system using the COMPAQ User Diagnostics diskette. Total memory installed: 98304 Kbytes Diskette Drives CMOS checksum invalid, default values loaded F1: Save Changes Compaq Deskpro 4000 To the trained eye, the information in this start-up text error message says a lot. Don't concern yourself with those details; just note the line that says CMOS checksum in
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top “CMOS check sum error” while booting up vote 1 down vote favorite I am using an HCL desktop system (Core 2 Duo, 1 GB RAM, Windows XP SP2). While booting I got the following message. CMOS check sum error. Press f1 to continue When pressing F1 it is working fine. I checked some other sites for this problem. They suggested to change the CMOS battery. I have changed the new battery. Still I have the problem. How to resolve this problem? boot checksum cmos share|improve this question edited Oct 15 '12 at 7:28 slhck 125k38312360 asked Oct 15 '12 at 6:23 Haridharan 813 2 Try resetting the BIOS to defaults. –Karan Oct 15 '12 at 6:27 try upgrading the BIOS to the latest version. –bettsy583 Oct 15 '12 at 6:30 is possible to update the BIOS via offline? can you please share the steps? –Haridharan Oct 15 '12 at 6:54 @Haridharan If you mean reset it offline, yes but it is motherboard spcific. Go download/find the manual for your motherboard and you are looking for something called CMOS reset. It usually involves moving a jumper on the motherboard. –Scott Chamberlain Oct 15 '12 at 7:49 Little bit confused before updating the BIOS. Can you please help me. detailed system info : MainBoard -> Gigabyte 945GZM-S2 , Chipset -> Intel i945G/GZ , Processor -> Intel Core 2 Duo E4400 @ 2000 MHz , BIOS Version ->FC HI, BIOS Date ->04/24/2007(mm/dd/yyyy) . While downloading the BIOS update there are 3 revisions and each revision contains multiple BIOS revisions. I can find the FC version in rev 2.1 and its release date is 01/12/2007(mm/dd/yyyy). it is less than my bios date