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When starting the Compaq Presario, the internal clock does not keep time and date. It reverts back to Jan 1 1998 12:00AM with an error in the bios saying of real time clock eror.

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  • smcneil Oct 15, 2007

    Can you give me an idea where the battery is located on the board, or are you referring to the battery pack?

  • smcneil Oct 15, 2007

    OK Thanks a lot. I looked t the board briefly without removing too much of the shields and cold not see anything like thaton a desktop pc.

  • joinfixme Feb 29, 2008

    I have the same problem exactly. Took it in today to a good repair shop and He tore it apart quickly and sai He could not locate the battery. I looked myself and did not see it. This is the date and time battery for a 1255 Compaq laptop...10 years old. Where exactly is battery located.

    Im not sure how You can describe where it is, but if You say under or near xyz I can tell the Man at the repair store..Thank You

  • Anonymous Mar 28, 2014

    date and time reverted back to 2000 Jan. 1



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Make sure your setting is to synchronize with whatever you use for an operating sytem

Posted on May 01, 2009

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Under the keyboard, under the heat sink , under the modem. cm1220 battery.. no wires.. just a snap clip.. i found it while researching this problem. need to go get one..

Posted on May 11, 2008


The battery for this model is under de MODEM. Take out de keyboard, on the left hand you can see a plate, under ir de battery

Posted on Apr 17, 2008

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Same problem battery date and time, unable to locate it.....where is it inside exactly..Thanks

Posted on Feb 29, 2008

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Posted on Oct 14, 2007


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Why does the sony HDR-SR11 keep resetting the date and time?

probably need to replace cmos battery as it is probably not holding charge therefore not keeping internal clock going ,every time you restart it goes to it original clock setting when made as default time.

Jul 24, 2014 | Compaq CMOS Battery

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Compaq Presario CQ56-100SJ [XL580EAR] The clock keeps changing. I set the time, the timezone was already selected but everytime I look down, it's changed. After shutting down, it seems the time...

Assuming you don't have a virus, the laptop's internal (CMOS) battery may be bad. Apart from keeping the time current, it holds onto your machines bootlog. If the machine starts up in Safe Mode, it would likely be the CMOS battery that's bad.

Oct 18, 2011 | Compaq Presario CQ56-115DX Laptop

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Compaq Presario 2500 stopped loading windows XP with a prompt STOP: c0000221 {bad Image Checksum} The image COMCTL32.dll is possibly corrupt. The header checksum does not match the computed checksum.

This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.

During the boot process you will see on the screen to press delete to enter setup
Press and hold delete during the boot up process to enter BIOS you can load failsafe defaults or load optimized defaults ,press escape then press f10 to save to cmos to restart
click start control panel date and time you can make your adjustments to the date and time from there also right click on the date and time on the bottom toolbar (bottom of screen) you should see Adjust date and time tab
hope this helps you

Sep 09, 2011 | Compaq Presario 2100 and 2500 ,NX 9000...

1 Answer

Before to start laptop appair the following error: 0270 real time clock error. save to disk file not found save to disk feature is disabled run phdisk for information.FILE:create new. ...

compaq is HP so best is to ask them, there, now here.
RTC error mean , the RTC coin cell is dead.
all PCs this old are dead battery ,
RTC= real time clock chip says IM DEAD, but is battery dead ,..

remove the coin cell, and put in a new one.
end story.
then set time .
best is to set time in BIOS setup. 1st.

this Compaq is 18 years old now. or 126 dog years.
id , push it off a cliff on the 4th July with fireworks. and all.
let me guess its XP the VIRUS magnet.
some this old are windows 98
a hopeless case there, no? no support, no books and no updates.
the books at HP are long gone
so now all books are , sold by horders. $$$
it can be costly and dangerous to deal with folks like that.

the book you lost , , the answer is on page 18
seen here
see coin, remove it and put in new one. end story.

Jun 27, 2017 | Compaq Presario 1255 Notebook

1 Answer

Well i have a few problems the first is it Says that there is a disk drive 0: Fujistu MHF2043AT error, and Real time Clock error,and it can not find save to disk file, and can not boot at all. I have...

One thing at a time.
The real time clock is kept on time by a CMOS battery and if the battery goes flat, the time will be lost as will the CMOS data that tells the notebook that there is a hard drive installed.
Replace the CMOS battery first, set the time and date in the BIOS then let the BIOS detect the hard drive.
When the BIOS bit is happy, place a system disk in the DVD Drive and load a fresh OS.
Hope that helps, and have a nice Xmas.

Dec 23, 2010 | Compaq Presario 1255 Notebook

2 Answers

HP Compaq nc6400 won't keep any BIOS settings

HP Compaq nc6400,,is the bios pin on correct jumpers?

Dec 30, 2017 | HP Compaq nc6400 Notebook

1 Answer

Save to disk file not found run ph disk for info

the cmos is under the aluminum of the keyboard try to remove it carefully its too easy

Jul 16, 2009 | Compaq Presario 1275 Notebook

1 Answer

Not keeping time

Go into the BIOS by pressing F2 when you first turn on the laptop. In the main screen you should be able to change the time and date. After you do that save the changes and exit and go into windows and see if the date and time is current.

Let me know how it goes.

May 12, 2009 | HP Compaq Presario S3040SE (DF222AR#ABA)...

1 Answer

Date keeps reverting to 10/08 and clock won't keep time

i donno much........ may be ur comp inbuilt[battery used 4 time setting] battery would hav run out....... i think so

May 11, 2009 | Compaq Presario 1275 Notebook

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