Boot Checksum Error
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Warning Cmos Checksum Error
for your PC hassles Home Hardware Troubleshoot a BIOS or CMOS 'Checksum' Error Comments By Rick Broida, PCWorld
Cmos Checksum Error Means
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
Cmos Checksum Failed
did 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 cmos check error long out of warranty.) Fortunately, this sounds like 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
2014 by Alex Barbos A BIOS checksum error is one of the most common errors you can encounter when you build your own computer, perform a hardware upgrade or attempt to bring back to life a computer that hasn’t been used checksum error fix for a long time. If it sounds like a scenario that’s not very likely to checksum error defaults loaded happen to you, think again, as computers became so un-complicated that you don’t need to be working at NASA to know how bad image checksum to upgrade or even build one yourself; in fact, learning how to build your own computer is as simple as taking this online course, so the possibility of coming across a BIOS checksum error one day is http://www.pcworld.com/article/240331/troubleshoot_a_bios_or_cmos_checksum_error.html higher than you think. The error indicates that the BIOS is incorrectly configured or corrupted, preventing the computer from booting normally; unlike operating system errors or software errors that occur after your computer is up and running, a BIOS checksum error will render it inoperable right after you power it on, so it’s no wonder this type of error can seem like something really serious. Fortunately, it is not as scary as it https://blog.udemy.com/bios-checksum-error/ seems, and fixing it is quite easy. BIOS Basics In order to understand what triggers the BIOS checksum error, what the error means and how you can fix it, it is necessary to understand what the BIOS is and how it works. Simply put, the Basic Input/Output System, or BIOS, is a program that checks if all the components necessary for the computer to run are present; if everything is ok, the BIOS gives the processor the necessary instructions on how to proceed and load the operating system. Before the boot code in the BIOS is executed, though, the BIOS data is checked for authenticity by comparing one of its values, known as a checksum, against a value stored in a memory chip called CMOS; if the values match, it means that everything is working correctly, so the boot code is executed and the computer starts normally. However, if the checksums do not match, it means that something interfered with the BIOS, so the computer displays a BIOS checksum error and stops the boot process. Causes of BIOS Checksum Errors There are two scenarios that can trigger a BIOS checksum error: Something interacts with the BIOS code and interferes with the checksum it generates; Something alters the pre-defined checksum values present in the CMOS memory. The first scenario usually
CMOS Checksum Error StarletFroast SubscribeSubscribedUnsubscribe4444 Loading... Loading... Working... Add to Want to watch this again later? Sign in to add this video https://www.youtube.com/watch?v=G2yRfclYm-g to a playlist. Sign in Share More Report Need to http://superuser.com/questions/487857/cmos-check-sum-error-while-booting report the video? Sign in to report inappropriate content. Sign in Statistics 75,302 views 41 Like this video? Sign in to make your opinion count. Sign in 42 25 Don't like this video? Sign in to make your opinion count. Sign in checksum error 26 Loading... Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on May 30, 2012Click here to fix registry::http://www.reginout.net/Different strategies used for solving this problem::Restart the computerReplace CMOS BatteryReset Default CMOS SettingsScan Corrupt RegistryUpdate your BIOSReplug CPU ComponentsReplace cmos checksum error your MotherboardFor more information click here::https://www.facebook.com/notes/backsp... Category Howto & Style License Standard YouTube License Show more Show less Loading... Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next How to Clear the CMOS - Reset the BIOS & Why - Duration: 11:59. Johnny Phung 1,716,139 views 11:59 CMOS Checksum Bad - Quick Easy Fix 1 - Duration: 2:14. HealMyPc 5,202 views 2:14 How to temporarily fix "CMOS checksum error-defaults loaded" - Duration: 3:48. JCarterDammit 179,478 views 3:48 How to replace dead CMOS battery and configure BIOS settings - Duration: 6:35. Cube Computer Channel 185,213 views 6:35 Solving the CMOS checksum error - Duration: 1:31. DiegoG's Tech Channel 2,638 views 1:31 How To Reset CMOS - Duration: 2:23. eTeknix 694,103 views 2:23 CMOS Error *Fix* - Duration: 2:03. Justin Harper 3,109 views 2:03 How to Clear CMOS ? - Duration: 2:32. MSI Global 407,976 views 2:32 How To Reset
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