Question about Compaq Presario 4640 (311300-003) PC Desktop

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Need to change battery in compaq presario 4640

I have to reset the clock every time i turn on computer. it reverts back to 1997. works fine after reset.

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Unfortunately, most manufacturers will not list the exact type and model of your CMOS (Motherboard) battery; therefore, you will need to open up your computer, locate the battery on your motherboard, and record the information about it such as voltage, chemistry, wiring, and packaging. If possible, remove the battery and take it to the location you plan on purchasing a new battery from.You may be able to find replacement batteries at a nearby electronic store like Radio Shack, or online via a Google search.

Posted on Mar 12, 2009

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Posted on Jan 02, 2017

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Seems the clock on my desktop compaq computer is running very slow. Where should look??

If your change your computer clock to fix it by double clicking the clock in the lower right of the screen. You turn the pc off and the clock is wrong or over time its wrong you may have a few things to look at

first check if the time zone (same way you look at the clock to change it buyt select time zone settings) to see if that is correct. If that is then the first thing is to purchase a new CMOS battery from a store liek walmart. These batteries are 1-4 $ depending where you get them and the quality. You can open the computer up and look for a silver battery about the size of a quarter. Remove it carefully while the pc is OFF. take it to a store and buy the new one then replace it.

Jan 18, 2011 | AMD Compaq Presario Desktop w/ Sempron...

2 Answers

I have an old Compaq Presario Evo N610c and will appreciate anybody’s help to solve my problem My battery charging light does not come on when connected to the AC charger adapter 1. Compaq Power...

Many issues...
1 u need to change the CMOS battery inside the notebook, it's a CR2032 model battery a size of a small coin (1 Dime) keeps the clock tick inside..that's why ur date goes back to 1980...
2 as regards to the battery not charging the battery is old and worn out so u need to change that too...the old battery is causing a shorting of circuit so the battery needs to be pulld out for u to start...
3 with respect to the errors...registry needs to be cleaned and my be a reformat of disk is required....
pls revert back

Sep 26, 2010 | Compaq Evo N610C Notebook

1 Answer

Trying to install intel 333mhz from same "era" ('98) that works fine in another computer. but in 4640, it hangs at "entering setup" screen

Check the machine to make sure if has a 333mhz operation level,,, and not like a 133 mhz. You can tell this on the model tag that shows the serial number and operation info.

Oct 10, 2009 | Compaq Presario 4640 (311300-003) PC...

1 Answer

Compaq Presario cq50 will not power up.

try resetting the bios (by removing the battery normally in ram area)

Sep 22, 2009 | Compaq Presario 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

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

1 Answer

I've got a compaq presario 1245 laptop. On booting it gives me a black screen with "Error 0270 Real Time Clock Error" I can get into the Setup and boot screens (F1 & F10) but any changes (reset date/time...

you will need to open your computer and look inside. if you are not sure take to a repair centre, the battery is on the motherboard, thats why you need to take really if you are going to be doing it. But i would advised to get a IT guy to do it for you. once its taken out you need to replace it with a new one.

Mar 25, 2009 | Compaq Presario 1275 Notebook

1 Answer

Time troubles

Your BIOS battery might be down. Becoz your board clock needs power from the board battery. So changing the battery on board will fix your problem.


Mar 29, 2008 | Compaq Presario Notebook

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