Question

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how to fix this?

By prettymars ·
i have a computer that is Microsoft Windows XP Home Edition it has been a while now that it does not start normally. i have to press F2 so i can proceed. this is what it appears on screen.
press f8 for BBS POPUP
Pc2-5300 single channel mode
initializing usb controllers.. done.
896mb +128mb
usb device: 1mouse
auto - detecting pri master.. atapi cd-rom
auto - detecting 3rd master.. ide hard disk
pri master: asus drw 2014L1 1.01
ultra dma mode-4
3rd master st380815as 3.chf
ultra dma mode-5, s.m.a.r.t. capable and status ok
auto-detecting usb mass storage devices..
00 usb mass storage devices found and configured
cmos checksum bad
cmos date/time not set
press f1 to run setup
press f2 to load default values and continue
i tried f1 to run setup i change the date and time there a few times. when i reboot it start normally. but problem is the next day i start the computer again it is back to what it is.
how can i fix it? and also when i insert a cd/dvd it cannot open the content. please help..

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All Answers

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Big clue: CMOS checksum BAD

by mjd420nova In reply to how to fix this?

This really jumps out at me. Before you go any farther, replace the CMOS battery. The F2 key sets the default and will allow you to boot but if you check the date/time you'll find the date the BIOS was written. That battery is VERY important.

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Reponse To Answer

by prettymars In reply to Big clue: CMOS checksum ...

what if the battery is not replaced? would there be more errors?

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Put simply

by OH Smeg In reply to how to fix this?

The BIOS Battery has gone flat and the CMOS Settings have been wiped.

You need to replace the Battery in a desktop this is a Coin Battery CR2032 that provides power to the Real Time Clock and the Volatile CMOS Settings.

Once this Data is wiped you should get a series of errors starting with the F2 bit and flowing through to things like the Software was written before the current time. As the RTC defaults to the beginning on some M'Boards this can be a very long time ago before Windows XP was written.

Computer Logic tells the system that it's not possible to have Files written before todays date.

Col

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Reponse To Answer

by prettymars In reply to Put simply

can i ask, why the bios battery gone flat and cmos settings have been wiped..what is the cause of that? i do like computers a lot but when it comes to errors i have no clue at all.:)

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Reponse To Answer

by brian_meahan - TechToolBox.com In reply to Put simply

Batteries die. In the case of a pc, that battery provides the little bit of power that allows the cmos to retain it's settings. When the battery dies then there is nothing supplying power for the cmos settings. FYI, when a customer goes in and borks their cmos settings that is one of the quick fixes. Pull the battery out and let if fall back to default settings.

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The battery in question...

by SmartAceW0LF In reply to how to fix this?

costs about $2.00. A trip to the store, replace said battery and if problem is not resolved then return and ask for further instructions toward a resolution. Remember where the answer came from and thank them. Please try to bear in mind that what you receive here in the way of technical help, costs many of the clients serviced by the same techs answering your questions as much as several hundred dollars per hour. What is the difference between you and those paying clients? Usually, or so we like to think, that would be a little bit of luck and a sense of direction in where to begin looking for technical answers. Hint... Google is the technicians BEST friend. If you desire to keep your tech speaking to you amicably, try to narrow your questions down to specifics as much as possible.

As an example above in OH Smeg's reply, no doubt his answer seems cryptic to you. In fact though, it is about as specific and to the point as any reply could possibly hope to be. Try googling the terms CMOS, BIOS, RTC for a better understanding of what he is speaking of. Good luck on your journey of understanding.

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Reponse To Answer

by prettymars In reply to The battery in question.. ...

thank you SmartAceW0LF

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The Battery powers the Real Time Clock

by OH Smeg In reply to how to fix this?

This is a Coin Battery costs a few cents maybe $2.00 for a one off buy, and it goes flat when the computer is unpowered for a long time. Typically it will last for several years before it needs replacing.

The reason that computers have RTC's is to allow them to know the Time and Date when they are turned on among other things. The BIOS also stores things like the CPU's Speed, the Amount of Installed RAM and the HDD/s Sizes as well as any Custom Settings that have been changed from the Defaults.

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Reponse To Answer

by prettymars In reply to The Battery powers the Re ...

thank you OH Smeg

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Think of the CMOS battery that is similar to a battery of a car...

by Peconet Tietokoneet In reply to how to fix this?

When the battery of a car is dead it will not start, but you could push the car to try and start it. So, to the CMOS battery, push start it, press "F1" and start to enter the date and time and reboot, but when you shut down (turn off) your computer it goes back to the old date and time, Do you really want to keep on inputting the time and date ALL the time your computer boots up (same as pushing to restart the car)? A new CMOS battery is the best choice here. You need to look at tthe battery and find the number to replace with the similar Ex: "2032".

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