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Flashing Bios


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9 replies to this topic

#1 bealer46

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Posted 05 June 2008 - 03:57 PM

:thumbsup: i have a computer that wont boot unless i remove the cmos battery and unplug the power cord for a while.it will then display a screen showing a checksum error in bios then boot normaly.i have an hp pavilion d4100e with a asus a8ae-le mobo.it runs pheonix award bios v 6.00pg.is it possible to flash the bios and if so where can i find the program.any information is greatly apreciated thanks

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#2 Platypus

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Posted 05 June 2008 - 06:16 PM

What is the exact wording of the checksum error? This is usually a CMOS checksum error, which relates to the storage of BIOS settings in CMOS memory that is part of the real time clock, not a fault in the BIOS's own flash RAM chip.

If it's a CMOS checksum error, have you tried using a new battery? The existing one may be just failing to hold the CMOS data, so the BIOS gets corrupted settings data at boot.

If the BIOS itself had a checksum error due to a faulty flash RAM chip, removing the CMOS battery would not correct this, and the BIOS chip would have to be replaced.

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#3 bealer46

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Posted 05 June 2008 - 10:16 PM

the screen reads,U M B upper limit segment address f000h .defalt bios settings have been loaded due to bios update or checksum issue.i'm kind of new to computing.maybe it's time to shop for a new mobo.i replaced the cmos battery and had the same results.what do you think.thanks bealer 46

Edited by bealer46, 05 June 2008 - 10:23 PM.


#4 bealer46

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Posted 05 June 2008 - 10:33 PM

the screen reads,U M B upper limit segment address f000h .defalt bios settings have been loaded due to bios update or checksum issue.i'm kind of new to computing.maybe it's time to shop for a new mobo.i replaced the cmos battery and had the same results.what do you think.thanks bealer 46



#5 usasma

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Posted 07 June 2008 - 06:46 AM

If you've flashed the BIOS to update it, this may be the result of a bad flash (and may require a new BIOS chip or motherboard)
If not, then it seems to indicate an issue within your BIOS (since you've replaced the battery) - I'd suggest visiting the HP website for instructions on how to flash the BIOS and for the download: http://h10025.www1.hp.com/ewfrf/wc/softwar...;product=501193
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#6 bealer46

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Posted 14 June 2008 - 03:46 PM

thanks every one for your help.i bought a new mobo.i could'nt find a socket 939 mobo so i got socket 775 with a intel dual core.i read everything i could.installed it .this was the first mobo swap iv'e done.everything worked the first time.i got lucky and its faster.thanks again.

#7 dc3

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Posted 15 June 2008 - 01:25 AM

Is this a new installation of XP that you are currently using with this new motherboard?

The reason that I ask is that there is a potential problem when you take a hdd with windows installed which has been seeing the chipset of one motherboard and introducing it to another motherboard with a different chipset. This can confuse the OS and require it to be reinstalled. These results may not appear immediately, so if you OS system is functioning normally now I would back up all of your important files.

This article explains this problem, it also provides a link to Microsoft which addresses it as well.

I know that there are some lucky people out there that have gotten away with doing this, but most aren't so lucky.

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#8 bealer46

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Posted 15 June 2008 - 10:11 PM

i read something about os not working with a strange chipset.so i wiped the hard drive before i pulled the old mobo.then with the new mobo installed the os.i have all the drivers and most of the programs that i use on cds.this is a great fourm.i'm glad i found it. i got most of the information i needed right here.thanks for the headsup

#9 vinaykumar

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Posted 15 June 2008 - 10:21 PM

Flashing bios means you are going to take the life of the mother board.Because in some cases after flashing bios,the mother board may become weak and it would not be support and work.So it is better to order the company or it is better to replace the another bios which suit for your motherboard. It will be availble in the spairs market.

Edited by vinaykumar, 15 June 2008 - 10:23 PM.


#10 dc3

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Posted 15 June 2008 - 11:32 PM

Flashing bios means you are going to take the life of the mother board.Because in some cases after flashing bios,the mother board may become weak and it would not be support and work.So it is better to order the company or it is better to replace the another bios which suit for your motherboard. It will be availble in the spairs market.


The worse case scenario when flashing the BIOS would be a failed BIOS, it would only effect the EERPOM chip that the BIOS is stored on, it would not have any other effect on the motherboard itself. This would effectively mean that the computer wouldn't work at all. This could be remedied by purchasing another EEPROM chip from the motherboard manufacturer with the current BIOS installed.

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