Question about Compaq Presario R3000 Notebook

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My compaq presario r3000 wont charge. its plugged in but when i unplug it it immediatly turns off. the battery life constantly says 0%. it wont drop from that or get any higher. in the bottom right hand corner it says ac power but like i said it wont charge.

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Sounds like the battery, had similar problems.. if you purchase a new battery make sure you get the right kind there are two types, an 8 cell or 12 cell..

The fix for my pressario involved completely stripping it and soldering 3 pins on the power connector on the mainboard.. not difficult but no mean feat.. now works perfectly (with the inclusion of a 12cell battery)

Posted on Dec 31, 2010

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Depending on the age of the battery it may be past its ability to accept a charge, solution, new battery.

Posted on Dec 28, 2010

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Try and remove the main battery, get a toothbrush and clean the metal pins on the battery and the matching pins in the battery compartment. Put the battery back in to see if it will take a charge, if it does, leave it overnight, failing that it means the battery is completely dead, or in very rare cases the charging circuit in the laptop is not working.

Posted on Dec 28, 2010

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SOURCE: wont charge

It could be that your battery is defective/worn out. If the computer just shuts off immediately (doesnt try to hibernate/standby) then you're likely looking at replacing the battery. They can suddenly do things like this if a cell shorts out in the battery or due to common wear. But first, here are a couple of things you can try.

1. Try reseating the battery (pull it out and put it back in). Sometimes something that simple can fix the problem.
2. Try to calibrate the battery. Your computer may come with instructions on how to do this, but if not you can do it manually. Turn the computer on but go into BIOS (press F10 at the compaq logo screen). Don't load your operating system
Unplug your computer. If it turns off at this point, your battery is already toasted. Replace it.
If the computer keeps running, let it go until it finally shuts off due to battery drain. Then plug it back in and let it recharge completely. This will let the microchip in the battery learn its charge potential and may allow you to get more life out of it.

Note: Calibrating these batteries is good practice but it shouldn't be done very often. If your calibration doesn't work after 1 or 2 tries, you probably still are looking at a dead battery.

Posted on Apr 23, 2008

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Thank you for the opportunity to assist you in resolving your issue. Should you need further information or assistance please do not hesitate to let us know.

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3 Answers

Wont charge


It could be that your battery is defective/worn out. If the computer just shuts off immediately (doesnt try to hibernate/standby) then you're likely looking at replacing the battery. They can suddenly do things like this if a cell shorts out in the battery or due to common wear. But first, here are a couple of things you can try.

1. Try reseating the battery (pull it out and put it back in). Sometimes something that simple can fix the problem.
2. Try to calibrate the battery. Your computer may come with instructions on how to do this, but if not you can do it manually. Turn the computer on but go into BIOS (press F10 at the compaq logo screen). Don't load your operating system
Unplug your computer. If it turns off at this point, your battery is already toasted. Replace it.
If the computer keeps running, let it go until it finally shuts off due to battery drain. Then plug it back in and let it recharge completely. This will let the microchip in the battery learn its charge potential and may allow you to get more life out of it.

Note: Calibrating these batteries is good practice but it shouldn't be done very often. If your calibration doesn't work after 1 or 2 tries, you probably still are looking at a dead battery.

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