Cmos Checksum Error 2 Beeps
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chip on the motherboard (CMOS). It controls systems devices and test memory. It allows you to configure specific parameters about the hardware in your computer such
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as time, date, disk drive parameters and other device settings. Beeps are emitted from cmos checksum error press f1 to continue a computer during the boot process when some problem is encountered and can be used to troubleshoot a dead computer. They
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indicate problems such as bad memory, bad keyboard or bad motherboard. Usually if you hear beeps there is something real wrong and you should immediately turn off the computer and perform some troubleshooting. POST Beeping loi cmos checksum error Error General Codes Bad Motherboard - 1 long and 1 short beep Disk drive related problem / Video card problem - 1 short beep then nothing happens Bad video card - 1 long and 2 short beeps Bad power supply - 1) continuous beeps, 2) non-stop short beeps Bad memory - 3 short beeps These codes DO vary from one manufacturer to another. Almost all computers list the appropriate codes in cmos checksum error defaults loaded solution the User's manual under technical information or the troubleshooting section, so be sure to check the manual and verify what the codes mean. If no beeps are heard and no display is on the screen, it's most likely the power supply. Check for Keyboard lights or for hard drive/floppy drive lights. If lights come on then power supply is good. Next, inspect the motherboard for loose components. A loose or missing CPU, BIOS chip, Crystal Oscillator, or Chipset chip will cause the motherboard not to function. If there are lights, then it could be one of the I/O cards. Try removing each card one at a time and restarting the computer. Error Codes/Beeps for AMI, Award, Compaq, IBM, Phoenix , BIOS's AMI AMI Beep Codes Except for beep code #8, these codes are always fatal. 1 beep Refresh failure - try reseating the memory, if the error still occurs, replace the memory 2 beeps Parity error - try reseating the memory, if the error still occurs, replace the memory 3 beeps Base 64K memory failure - try reseating the memory, if the error still occurs, replace the memory 4 beeps Timer not operational, system board bad 5 beeps Processor error, system board bad 6 beeps 8042 - gate A2
starting the remainder of the boot process. If the computer passes the POST, the computer may give a single beep (some
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computers may beep twice) as it starts and continue to boot. cmos checksum error defaults loaded diskette drive 0 seek failure However, if the computer fails the POST, the computer will either not beep or generate a beep
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code that tells the user the source of the problem. If your computer has an irregular POST or a beep code not mentioned below, follow the POST troubleshooting http://www.bndsys.com/SupportDocs/ErrorMessages/BiosBeepCodes.htm steps to determine the failing hardware component. AMI BIOS beep codes Award BIOS beep codes Dell beep codes IBM BIOS beep codes Macintosh startup tones Phoenix BIOS beep codes Motherboard help AMI BIOS beep codes Below are the AMI BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this http://www.computerhope.com/beep.htm BIOS, the beep codes may vary. Beep Code Descriptions 1 short DRAM refresh failure 2 short Parity circuit failure 3 short Base 64K RAM failure 4 short System timer failure 5 short Process failure 6 short Keyboard controller Gate A20 error 7 short Virtual mode exception error 8 short Display memory Read/Write test failure 9 short ROM BIOS checksum failure 10 short CMOS shutdown Read/Write error 11 short Cache Memory error 1 long, 3 short Conventional/Extended memory failure 1 long, 8 short Display/Retrace test failed two-tone siren Low CPU Fan speed, Voltage Level issue AWARD BIOS beep codes Below are Award BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. Beep Code Description 1 long, 2 short Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information 1 long, 3 short Video card not detected (reseat video card) or bad video card Beeps repeati
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 http://www.tech-faq.com/cmos-checksum-bad-error.html 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 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 cmos checksum error 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. If all the settings are lost, they can usually be retrieved from the computer manufacturer. Now locate the battery and remove it. Consult the computer manual or technical support to remove your battery (the battery is flat, shiny silver colored, and coin-shaped) if needed. Take down the CMOS battery’s information such as volt, size, etc. Replace the old battery with a new one and reenter the CMOS settings. If the battery caused the CMOS Checksum Bad Error, the problem should be solved. The BIOS May Have Been Updated If the BIOS was recently updated, the CMOS settings may have reset. Make sure that the valu