Cmos Checksum Error Can Enter Bios
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PC Smart fixes for your PC hassles Home Hardware Troubleshoot a BIOS or CMOS 'Checksum' Error Comments By Rick Broida, cmos checksum error dell 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 something that changed loi cmos checksum error 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 a pretty easy problem
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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 manufacturers figured out a better way to power the CMO
Smartphones More Software Memory Power Supplies Peripherals Displays Automotive PSUs Android Your question Get the answer Tom's Hardware>Forum>Motherboards>BIOS/CMOS CHECKSUM BAD and Keyboard Recognition Issue> BIOS/CMOS CHECKSUM BAD and Keyboard Recognition Issue Tags: cmos checksum error defaults loaded keyboard unresponsive BIOS Checksum Motherboards CMOS Keyboards Last response: December 21, 2014 5:07 PM in cmos checksum error defaults loaded diskette drive 0 seek failure Motherboards Share Robotease December 21, 2014 8:26:27 AM I apologize in advance for the gigantic wall of text, but I don't
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know how to shorten it without leaving out details, and I'd rather not do that... Preface: I got a (different) PC from a friend to inspect and assess for hardware upgrade. Took my known good http://www.pcworld.com/article/240331/troubleshoot_a_bios_or_cmos_checksum_error.html (old) PC (the one in question for this post, actually) and decided to take it apart, see what I could scalp from it. Different PC is too far gone, sticking to putting old PC back together and gift that away instead, since it has consistently started up and worked perfectly fine even up to two months ago. This is where we begin... Gathered what specs I could: OS: Microsoft Windows http://www.tomshardware.com/answers/id-2436288/bios-cmos-checksum-bad-keyboard-recognition-issue.html 7 Ultimate 64-bit BIOS: American Megatrends (last update was listed as 2008, I believe) MOBO: Asus P5B-VM SE CPU: Intel Core 2 Duo PSU: Corsair 750W RAM: 1GB (I couldn't locate make/model, apologies) GPU: ATI Radeon HD (7770?) Ghost Thermal GDDR5 So I put the PC back together again, stuck my monitor, keyboard, and mouse into the appropriate ports, and waiting for everything to boot, except I received a CMOS CHECKSUM BAD error, given options to either F1 to enter Setup or F2 to load default and continue. Nothing will load past that. Naturally, I hit F1. Get into BIOS, the keyboard won't work. I mean, the keyboard is plugged in, indicator lights are still on, and it obviously worked because I got myself into BIOS with it, but inside BIOS, it just will not work. Look at time and date, those are wrong. Try again. Once again I am stopped at the BIOS load screen saying CMOS CHECKSUM BAD. I read the rest of it above that error, it's loading every piece of hardware and peripheral just fine, except it says I have 2 keyboards being recognized. Um, no...? Nonetheless, I try entering Setup again. Once again, I am into BIOS and I cannot move anywh
the CMOS Checksum Bad Error, hence they can be handled effectively. The Error Explained A checksum is computed as an error http://www.tech-faq.com/cmos-checksum-bad-error.html detecting code to guard the BIOS settings stored in the CMOS memory. The https://www.youtube.com/watch?v=IVmgpNsj0-I 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 cmos checksum 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 cmos checksum error 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 the error still exists. If it does, go into the CMOS and write down all of the settings.
lahat Learn more You're viewing YouTube in Filipino. Switch to another language: English | View all Isara Oo, panatilihin ito I-undo Isara Ang video na ito ay hindi magagamit. Queue ng PapanoorinQueueQueue ng PapanoorinQueue Alisin lahatIdiskonekta Naglo-load... Queue ng Papanoorin Queue __count__/__total__ How to temporarily fix "CMOS checksum error-defaults loaded" JCarterDammit Mag-subscribeNaka-subscribeMag-unsubscribe139139 Naglo-load... Naglo-load... Gumagawa... Idagdag sa Gusto mo bang panoorin itong muli sa ibang pagkakataon? Mag-sign in upang idagdag ang video na ito sa isang playlist. Mag-sign in Ibahagi Higit pa I-ulat Kailangan mo bang iulat ang video? Mag-sign in upang mag-ulat ng hindi angkop na nilalaman. Mag-sign in Transcript Mga Istatistika 179,628 (na) panonood 297 Gusto mo ba ang video na ito? Mag-sign in upang magbigay ng iyong opinyon. Mag-sign in 298 94 Hindi mo ba gusto ang video na ito? Mag-sign in upang magbigay ng iyong opinyon. Mag-sign in 95 Naglo-load... Naglo-load... Transcript Hindi ma-load ang interactive na transcript. Naglo-load... Naglo-load... Ang rating ay available kapag ang video ay na-rent. Hindi available ngayon ang feature na ito. Pakisubukang muli sa ibang pagkakataon. Na-upload noong May 12, 2011I run into this from time to time, personally, i think my motherboard battery is shot, but im too lazy right now to fix it right now. If this happens to you do the following and it will fix it temporarily. This is how i fix the problem, probably not the only way (obviously) so yeah please Thumbs Up,Comment, And Subscribe! Watch this first, then watch this to permenantly fix this http://youtu.be/9uiVu3ARYQ0 Kategorya Paano Gawin & Estilo Lisensya Karaniwang Lisensya sa YouTube Magpakita nang higit pa Magpakita nang mas kaunti Naglo-load... Advertisement I-autoplay Kapag naka-enable ang autoplay, awtomatikong susunod na magpe-play ang isang iminumungkahing video. Susunod CMOS Checksum Bad - Quick Easy Fix 1 - Tagal: 2:14. HealMyPc 5,202 (na) panonood 2:14 Como reparar el error cmos checksun - Tagal: 7:42. Er Manu 14,534 (na) panonood 7:42 How to Clear the CMOS - Reset the BIOS & Why - Tagal: 11:59. Johnny Phung 1,714,603 (na) panonood 1