Hp Pavilion Bios Checksum Error
Contents |
Details Page SearchResult Error Page individual import test DisputeForm SWDSelfService SWDSelfServiceStep SWDSelfServiceFinish SWDpFinderResults RemoteConnection ExitDisclaimer Warranty the cmos checksum is invalid cmos reset 502 Check Unknown Warranty Historical Products MediaOrdering IdentifyProduct changeProductPFinderResults WCM Generic cmos checksum invalid default values loaded Page Customer Support MicroSite CustomerSupportMicroSitePPSTheme-2 MicroSite orderconfirmation productreplacement swdDriverDetails Z6_M0I02JG0KGSS30ACT8MPG200G1 Error: Javascript is disabled in cmos checksum bad fix this browser. This page requires Javascript. Modify your browser's settings to allow Javascript to execute. See your browser's documentation for specific instructions. {} Z7_3054ICK0KGTE30AQO5O3KA30U5 hp-support-head-portlet Actions cmos reset 502 fix ${title} Loading... HP Customer Support Z7_3054ICK0KGTE30AQO5O3KA30U7 hp-contact-secondary-navigation-portlet Actions ${title} Loading... HP Customer Support Support Home Products Software and Drivers Forums Contact Support Search Select your Model Let HP find my products Identify now HP can identify most HP products and recommend possible solutions. How does HP install software and gather
Cmos Checksum Error Press F1 To Continue
data? Privacy Policy © Copyright 2016 HP Development Company, L.P. Z7_M0I02JG0KONJ30ACBBF8MM1084 hp-hero-support-search Actions ${title} Loading... Search all support All Support Software, Drivers and Updates Troubleshooting How to Product Information User Guides Cancel Example: “Laserjet P1102w driver” or “HP Pavilion 17-f002na will not turn on” Loading Results Z7_3054ICK0KGTE30AQO5O3KA3014 hp-share-print-widget-portlet Actions ${title} Loading... Z7_3054ICK0KGTE30AQO5O3KA30N0 hp-concentra-wrapper-portlet Actions ${title} Loading... HP and Compaq Desktop PCs - Error: CMOS Checksum Bad This document pertains to all HP and Compaq Desktop Computers. One of the following error messages appears when starting the computer: BIOS ROM checksum error System CMOS checksum bad - default configuration used Press
Boot and Lockup  Notebook Wireless and Networking  Notebook Audio  Notebook Video, Display and Touch  Notebook Hardware and Upgrade Questions  Notebook Software and
Cmos Reset 502 Solution
How To Questions  Business Notebooks  Printers sprocket  Inkjet Printing  LaserJet Printing  cmos checksum error even after replacing battery Printer Software and Drivers  DesignJet, Large Format Printers and Digital Press  HP Connected, Mobile Printing and Cloud cmos checksum error fix Printing  Scanning, Faxing, and Copying  JetAdvantage, Printing Applications and Services  Desktops Desktop Operating Systems and Recovery  Desktop Boot and Lockup  Desktop Wireless and Networking  Desktop Audio  Desktop http://support.hp.com/us-en/document/c01368145 Video, Display and Touch  Desktop Hardware and Upgrade Questions  Desktop Software and How To Questions  Sprout by HP  Business PCs, Workstations and Point of Sale Systems  Gaming Gaming Notebooks  Gaming Desktops  Gaming Accessories  Tablets and Mobile Devices Elite x3  Android  Windows  Calculators  Palm and WebOS  Software HP Workspace  HP Touchpoint Manager  HP Collaboration  Commercial PC Software  http://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/CMOS-checksum-invalid-CMOS-502-Error/td-p/3996982 Archived Topics (Read Only) Notebooks Archive (Read Only)  Printers Archive (Read Only)  Desktops Archive (Read Only)  Tablets and Mobile Devices Archive (Read Only)  Software Archive (Ready Only)  Windows Beta and Previews Archive (Read Only)  Miscellaneous Topics (Read Only)  Your Voice Forum Feedback & Suggestions  HP Expert Portal Welcome to the HP Expert Program  Meet the Experts  News and Events  Blogs Open Menu Blogs Open Menu Best of the Community BlogMeet the ExpertsNews and EventsWelcome to the HP Expert Program Beware of fake HP Support Open Menu Beware of fake HP Support Open Menu Be alert for scammers who may be posing as HP representatives and only call numbers from people who have a label next to their screen name. If you think you have received a fake HP Support message, please report it to us by clicking on the blue “Report Inappropriate Content” button above the message. Thank you! Register · Log In HP Support Forum Home > Notebooks > Hardware > CMOS c
Blogs Viruses Cameras Components Computer Accessories Consumer Advice Displays E-readers Flash Drives Graphics Cards Hard Drives Home Theater Input Devices Keyboards Laptop Accessories Mobile Networking Operating Systems Optical Drives Processors Servers Smartwatches Streaming Services Storage Tablets Windows Hassle-Free PC Smart fixes for http://www.pcworld.com/article/240331/troubleshoot_a_bios_or_cmos_checksum_error.html your PC hassles Home PCs Troubleshoot a BIOS or CMOS 'Checksum' Error Comments By Rick Broida, PCWorld Sep 21, 2011 9:40 AM Reader Robert has an older Emachines desktop that recently developed a problem: "I http://www.tech-faq.com/cmos-checksum-bad-error.html installed a driver updater tool, and when I deleted it, it 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 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 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 cmos reset 502 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 manufacturers figured out a better way to power the CMOS? Contributing Editor Rick Broida writes about business and consumer technology. Ask for help with your PC hassles at hasslefree@pcworld.com, or try the treasure trove of helpful folks in the PC World Community Forums. Sign
the CMOS Checksum Bad Error, hence they can be handled effectively. The Error Explained A checksum is computed as an error detecting code to guard the BIOS settings stored in the CMOS memory. The CMOS Checksum Bad Error is an error that occurs when the CMOS values turn out to be incorrect. The CMOS memory stores a specific value normally to guard the BIOS software. Each time the computer is booted, this value, which is a number is checked against the stored value in the CMOS memory. If these two values are different, it causes a CMOS Checksum error message. If these values are the same, the computer boots normally. Each computer usually deals with the CMOS Checksum Bad Error differently. Some computers warn the user and continue to boot up using settings in the CMOS, while other computers might warn the user and use the default settings in the BIOS as the correct settings and carry on with a normal boot or reboot. Usually, the strategy the computer employs is stated in the error message. Causes of CMOS Checksum Bad Error There are usually three main reasons that a CMOS Checksum Bad Error occurs. They include: CMOS Battery may not be functioning properly. The battery life may have expired. The user or a virus may have updated the BIOS. The computer may not have been shut down properly e.g. shutting off the computer's main power without first shutting down the computer (MS Windows requires the computer to be shut down before the power is shut off). Solutions to CMOS Checksum Bad Error The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully. CMOS Battery May Not be Functioning Properly If the user suspects that the CMOS battery is not functioning properly, he/she can easily change it. Before changing the battery, reboot the computer to make sure that th