'fail safe' after bios flash - Abit AB9 PRO
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From: Michael Ingeman-Nielsen on 10 Dec 2006 17:01 Hi I have recently tried to flash my Abit AB9 PRO mobo with the latest bios version (15), mainly to get the following improvements (from the bios download page): 7. Audio now works as intended after resuming from S3. 8. The function "wake on LAN" now works as intemded. Now I get the CMOS CHECKSUM ERROR message that many before me have encountered. I have followed all the advice I have found that did not involve changing the hardware. The process was the following: As I don't have a floppydrive, I used the FreeDOS OEM CD-ROM disc builder assistant to create a bootable CD with the bios update, and set it to automatically run the cmdline: abitfae.bat AB9_15.BIN It seemed to work allright, the flash utility finished and I rebooted. I then cleared the CMOS and set it up again with the old settings after checking that the version was correct. I had no problems bootoing into Windows (I'm running MCE). The machine has been running for a few days without problems. The issues I had with sound before flashing were gone, so I was happy. After some days I wanted to change a simple BIOS setting, so I restarted the mashine, which until then had been either running or in standby. When I got to the POST screen, I got the CMOS CHECKSUM ERROR message again. It was a little suspicious, so I pressed F1 to see if I could boot to Windows. No problem. I restarted the machine again, and this time there was nothing...not even the POST screen. The current status is that after manually clearing the CMOS using ccmos1 jumper, I can boot the machine and get to POST the CHECKSUM ERROR message. But no matter what I do, I can't boot the machine again until I have manually cleared the CMOS once more. Any ideas?
From: peter on 10 Dec 2006 18:02 CMOS checksum errors Explanation: A checksum is computed as an error-detecting code, to protect the BIOS settings stored in the CMOS memory. Each time the system is booted this number is recomputed and checked against the stored value. If they do not match, an error message is generated to tell you that the CMOS memory contents may have been corrupted and therefore some settings may be wrong. BIOSes react in different ways to encountering this sort of error. Some will warn the user and then continue on with whatever settings were in the CMOS. Others will assume that the settings that were in the CMOS were corrupted and will load default values stored in the BIOS chip "for safety reasons". The error message will indicate which your system is doing. Diagnosis: The most common cause of checksum errors in CMOS is a battery that is losing power. Viruses can also affect CMOS settings, and motherboard problems can also affect the stored values. Recommendation: Follow the instructions in this section to address the CMOS corruption. You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values (hopefully against a recent BIOS settings backup). peter "Michael Ingeman-Nielsen" <ingeman(a)gmail.com> wrote in message news:1165788105.037751.171130(a)16g2000cwy.googlegroups.com... > Hi > > I have recently tried to flash my Abit AB9 PRO mobo with the latest > bios version (15), mainly to get the following improvements (from the > bios download page): > > 7. Audio now works as intended after resuming from S3. > 8. The function "wake on LAN" now works as intemded. > > Now I get the CMOS CHECKSUM ERROR message that many before me have > encountered. I have followed all the advice I have found that did not > involve changing the hardware. > > The process was the following: > As I don't have a floppydrive, I used the FreeDOS OEM CD-ROM disc > builder assistant to create a bootable CD with the bios update, and set > it to automatically run the cmdline: > > abitfae.bat AB9_15.BIN > > It seemed to work allright, the flash utility finished and I rebooted. > I then cleared the CMOS and set it up again with the old settings after > checking that the version was correct. > I had no problems bootoing into Windows (I'm running MCE). The machine > has been running for a few days without problems. The issues I had with > sound before flashing were gone, so I was happy. After some days I > wanted to change a simple BIOS setting, so I restarted the mashine, > which until then had been either running or in standby. When I got to > the POST screen, I got the CMOS CHECKSUM ERROR message again. It was a > little suspicious, so I pressed F1 to see if I could boot to Windows. > No problem. > I restarted the machine again, and this time there was nothing...not > even the POST screen. > > The current status is that after manually clearing the CMOS using > ccmos1 jumper, I can boot the machine and get to POST the CHECKSUM > ERROR message. But no matter what I do, I can't boot the machine again > until I have manually cleared the CMOS once more. > > Any ideas? >
From: Bird Janitor� on 11 Dec 2006 11:24 Michael Ingeman-Nielsen wrote: | | Hi | | I have recently tried to flash my Abit AB9 PRO mobo with the | latest bios version (15), mainly to get the following improvements | (from the bios download page): | | 7. Audio now works as intended after resuming from S3. | 8. The function "wake on LAN" now works as intemded. | | Now I get the CMOS CHECKSUM ERROR message that many before | me have encountered. I have followed all the advice I have found that | did not involve changing the hardware. | | The process was the following: | As I don't have a floppydrive, I used the FreeDOS OEM CD-ROM | disc builder assistant to create a bootable CD with the bios update, | and set it to automatically run the cmdline: | | abitfae.bat AB9_15.BIN | | It seemed to work allright, the flash utility finished and I rebooted. | I then cleared the CMOS and set it up again with the old settings | after checking that the version was correct. | I had no problems bootoing into Windows (I'm running MCE). The | machine has been running for a few days without problems. The | issues I had with sound before flashing were gone, so I was happy. | After some days I wanted to change a simple BIOS setting, so I | restarted the mashine, which until then had been either running or in | standby. When I got to the POST screen, I got the CMOS CHECKSUM | ERROR message again. It was a little suspicious, so I pressed F1 to | see if I could boot to Windows. | No problem. | I restarted the machine again, and this time there was nothing...not | even the POST screen. | | The current status is that after manually clearing the CMOS using | ccmos1 jumper, I can boot the machine and get to POST the CHECKSUM | ERROR message. But no matter what I do, I can't boot the machine again | until I have manually cleared the CMOS once more. | | Any ideas? | Hi Michael - The switches in Abitfae.bat are set to clear the CMOS to Failsafe Defaults. Clearing the CMOS manually with the CCMOS1 jumper does the same thing. Pressing F1 does nothing to correct the BIOS running the computer at Failsafe Defaults. Instead you need to press DEL at the POST screen to get into the BIOS setup screens. Once there first choose the option to Load Optimized Defaults. This will set your front side bus and CPU to the correct settings and will detect your memory timing defaults. From there you'll need to re-establish your boot devices and make any other customizations you made to the CMOS when you first set the BIOS up .. these will also be reset to defaults. After you've made your changes, choose Save and Exit Setup. Allow the computer to reboot (saving your changes to CMOS memory). The CMOS Checksum Error will be gone and, if you've set up your boot devices correctly, you should have no problems booting into your OS. Jef
From: Michael Ingeman-Nielsen on 21 Dec 2006 18:19 Hi. Thank you for your answer. Unfortunately it is still not working for me. Having restored the bios settings as you describe, I pressed F10 to save and exit. After the reboot, I got a blanck screen. I could hear the HD spin up, spin down and up again as if the machine rebooted once more, and then...nothing. Dead computer. I have to reset the CMOS to get it to POST again. Any more advise? thanks Michael Bird Janitor® skrev: > Michael Ingeman-Nielsen wrote: > | > | Hi > | > | I have recently tried to flash my Abit AB9 PRO mobo with the > | latest bios version (15), mainly to get the following improvements > | (from the bios download page): > | > | 7. Audio now works as intended after resuming from S3. > | 8. The function "wake on LAN" now works as intemded. > | > | Now I get the CMOS CHECKSUM ERROR message that many before > | me have encountered. I have followed all the advice I have found that > | did not involve changing the hardware. > | > | The process was the following: > | As I don't have a floppydrive, I used the FreeDOS OEM CD-ROM > | disc builder assistant to create a bootable CD with the bios update, > | and set it to automatically run the cmdline: > | > | abitfae.bat AB9_15.BIN > | > | It seemed to work allright, the flash utility finished and I rebooted. > | I then cleared the CMOS and set it up again with the old settings > | after checking that the version was correct. > | I had no problems bootoing into Windows (I'm running MCE). The > | machine has been running for a few days without problems. The > | issues I had with sound before flashing were gone, so I was happy. > | After some days I wanted to change a simple BIOS setting, so I > | restarted the mashine, which until then had been either running or in > | standby. When I got to the POST screen, I got the CMOS CHECKSUM > | ERROR message again. It was a little suspicious, so I pressed F1 to > | see if I could boot to Windows. > | No problem. > | I restarted the machine again, and this time there was nothing...not > | even the POST screen. > | > | The current status is that after manually clearing the CMOS using > | ccmos1 jumper, I can boot the machine and get to POST the CHECKSUM > | ERROR message. But no matter what I do, I can't boot the machine again > | until I have manually cleared the CMOS once more. > | > | Any ideas? > | > > Hi Michael - > > The switches in Abitfae.bat are set to clear the CMOS to Failsafe Defaults. > Clearing the CMOS manually with the CCMOS1 jumper does the same thing. > > Pressing F1 does nothing to correct the BIOS running the computer at > Failsafe Defaults. > > Instead you need to press DEL at the POST screen to get into the BIOS setup > screens. Once there first choose the option to Load Optimized Defaults. > This will set your front side bus and CPU to the correct settings and will > detect your memory timing defaults. > > From there you'll need to re-establish your boot devices and make any other > customizations you made to the CMOS when you first set the BIOS up .. these > will also be reset to defaults. > > After you've made your changes, choose Save and Exit Setup. Allow the > computer to reboot (saving your changes to CMOS memory). The CMOS Checksum > Error will be gone and, if you've set up your boot devices correctly, you > should have no problems booting into your OS. > > Jef
From: Michael Ingeman-Nielsen on 21 Dec 2006 18:22
Hi Thank you for your response. I'm quite sure it is not the CMOS battery, as the motherboard is brand new, and the clock is not reset when the power is cut. If you have any other suggestions, I would much apprechiate it. Thanks Michael peter skrev: > CMOS checksum errors > > Explanation: A checksum is computed as an error-detecting code, to protect > the BIOS settings stored in the CMOS memory. Each time the system is booted > this number is recomputed and checked against the stored value. If they do > not match, an error message is generated to tell you that the CMOS memory > contents may have been corrupted and therefore some settings may be wrong. > BIOSes react in different ways to encountering this sort of error. Some will > warn the user and then continue on with whatever settings were in the CMOS. > Others will assume that the settings that were in the CMOS were corrupted > and will load default values stored in the BIOS chip "for safety reasons". > The error message will indicate which your system is doing. > > Diagnosis: The most common cause of checksum errors in CMOS is a battery > that is losing power. Viruses can also affect CMOS settings, and motherboard > problems can also affect the stored values. > > Recommendation: Follow the instructions in this section to address the CMOS > corruption. You should make sure that all of the BIOS settings in the system > are correct, by rebooting the system, going into BIOS setup and > double-checking all the values (hopefully against a recent BIOS settings > backup). > > > > peter > > "Michael Ingeman-Nielsen" <ingeman(a)gmail.com> wrote in message > news:1165788105.037751.171130(a)16g2000cwy.googlegroups.com... > > Hi > > > > I have recently tried to flash my Abit AB9 PRO mobo with the latest > > bios version (15), mainly to get the following improvements (from the > > bios download page): > > > > 7. Audio now works as intended after resuming from S3. > > 8. The function "wake on LAN" now works as intemded. > > > > Now I get the CMOS CHECKSUM ERROR message that many before me have > > encountered. I have followed all the advice I have found that did not > > involve changing the hardware. > > > > The process was the following: > > As I don't have a floppydrive, I used the FreeDOS OEM CD-ROM disc > > builder assistant to create a bootable CD with the bios update, and set > > it to automatically run the cmdline: > > > > abitfae.bat AB9_15.BIN > > > > It seemed to work allright, the flash utility finished and I rebooted. > > I then cleared the CMOS and set it up again with the old settings after > > checking that the version was correct. > > I had no problems bootoing into Windows (I'm running MCE). The machine > > has been running for a few days without problems. The issues I had with > > sound before flashing were gone, so I was happy. After some days I > > wanted to change a simple BIOS setting, so I restarted the mashine, > > which until then had been either running or in standby. When I got to > > the POST screen, I got the CMOS CHECKSUM ERROR message again. It was a > > little suspicious, so I pressed F1 to see if I could boot to Windows. > > No problem. > > I restarted the machine again, and this time there was nothing...not > > even the POST screen. > > > > The current status is that after manually clearing the CMOS using > > ccmos1 jumper, I can boot the machine and get to POST the CHECKSUM > > ERROR message. But no matter what I do, I can't boot the machine again > > until I have manually cleared the CMOS once more. > > > > Any ideas? > > |