Checksum Error After Bios Flash
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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 for a long time. If it sounds like a bios checksum error fix scenario that’s not very likely to happen to you, think again, as computers became so un-complicated bios checksum bad that you don’t need to be working at NASA to know how to upgrade or even build one yourself; in fact, learning how to bad bios checksum starting bios recovery 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 higher than you think. The error indicates that the BIOS is incorrectly configured or corrupted, preventing
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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 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 cmos checksum bad fix 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 occurs when an incompatible piece of hardware is installed, as it will fail to pass the initial hardware check performed by the BIOS, and thus return a BIOS checksum error. A BIOS checksum error can also be generated by an incorrectly performed overclocking process. In case you are no
The How-To Geek Forums Have Migrated to Discourse How-To Geek Forums / Windows XP Bad Bios checksum (How to Fix it) ??? (39 posts) Started 4 years cmos checksum error on boot ago by tech27 Latest reply from G41M Topic Viewed 20879 times 1 2
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Next » tech27 Posts: 387 This post has been reported. So here's my problem guys... Recently I did a clean
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install of windows XP on my PC, everything goes smooth and no errors. But after a day I use it and shut it down for an hour and when I return and turn my https://blog.udemy.com/bios-checksum-error/ PC again this problem comes out... I have no idea why it happened, so if anyone knows how to fix this I will gladly appreciate it... Btw.. I have some experienced on PC troubleshooting but sad to say it is my first time to encounter this problem and I have no idea how to fix it.. So please I really need your help guys.... Reports: · Posted 4 years http://www.howtogeek.com/forum/topic/bad-bios-checksum-how-to-fix-it- ago Top Sarris Posts: 189 This post has been reported. Causes of CMOS Checksum Bad Error There are usually three main reasons that a CMOS Checksum Bad Error occurs. They include: 1. CMOS Battery may not be functioning properly. The battery life may have expired. (it's probably this) 2. The user or a virus may have updated the BIOS. 3. 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). This is from tech-faq.com Also, please don't multiple post the same question. Thanks & good luck Reports: · Posted 4 years ago Top tech27 Posts: 387 This post has been reported. First of all... Sorry for doing multiple post but I didn't meant to do that because every time I post it says "404 Not found" hmmm... so what should I do first to solve this problem ???? Reports: · Posted 4 years ago Top tech27 Posts: 387 This post has been reported. BTW.. what does CMOS means ??? Sorry I had never encounter a bios problem before..... Reports: · Poste
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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 checksum error after upgrading BIOS and clearing CMOS up vote 2 down vote favorite The system is a Gateway DX4831-3, with a MB.GAJ09.001 motherboard. The updated BIOS is revision P01.B1, downloaded from Gateway's website in the support/drivers section. I was able to flash the BIOS successfully using an SD card, but the machine hasn't been bootable since. Here's what it does: Starts up with a normal BIOS splash screen and single beep ("Press Del to enter setup", etc.) Begins bootup process, about 5 seconds Immediately before it would otherwise start looking for a boot device, beeps twice Then this error appears: [American Megatrends logo] CMOS checksum error Press Del to Run SETUP Press F1 to Continue Pressing Del enters BIOS setup, and the system is rebooted when I exit setup. Pressing F1 reboots the system right away, so I can't proceed any further in the boot sequence. I've tried just about everything in my bag of tricks, including the following: Flashing the machine several times with the BIOS, using several different SD cards, in case a write error somewhere was responsible. No dice, same problem every time. Taking out the CMOS battery, waiting 5 minutes, and putting it back in. Choosing "Load Default Setting