Question

Laptop battery plugged in, not charging

Hi, I have a HP Pavilion dv6 3284ca notebook running window`s 7. Two days ago, out of the blue, the battery icon started saying plugged in, not charging and is hovering at 10% without moving. As soon as I i unplug the adaptor, the computer shuts off without warning, not even going through the shutdown process. I have tried a number of solutions without any of them working. I have tried uninstalling the ACPI driver to no avail, taking out the battery and putting it back in. That also didn't work. I ran a battery test at startup and it said it was ok. I also ran the HP Support Assistant battery diagnostic, which also came back ok. I also tried taking the battery out and removing the adaptor cable, and then pressing the power button for 30 seconds and then putting the battery back in, which also didn't work. If anyone has a solution for this I will be very grateful.

p.s. This problem came out of the blue, the battery was working perfectly fine before.

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Comments
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Answer
Pretty well discussed. See link.
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Broken part

So as discussed in the link you gave me, the most plausible explanation is a defective part in the computer?

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That's one idea.

Did you try the ideas that seem to fix a few?

Also, I can't find how old the machine and battery is. The battery is all of a 300 cycle thing (about 18 months) and may well be past its prime. Do try what others noted in that other link. I don't want to upset you but I rarely duplicate the other discussion.
Bob

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Just to add briefly

Just to add briefly to what Bob said, once a battery is consumed it is not uncommon for capacity to drop off very quickly. Sometimes it is a slow gradual decline, other times it's as if battery life fell off a cliff. There's no way to tell which category a battery will fall into until it reaches the point of being consumed.

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Yeah but

I understand that the battery may be old, but if it were really dead, wouldn't all the tests and diagnostics i ran tell me that it is due to be changed? Because the test i did at start up by pressing F2 indicated that the battery status is ok. Same result for the HP Support Assistant test.

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No.

The tester for batteries is too expensive for most shops. This is why they just swap it out.
Bob

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No

No. I worked as a repair tech for around 3 years. Very quickly you learn that diagnostic programs have their uses, but only an idiot places blind trust in them. I've gotten false-positives, cases where the diagnostic program missed things that were extremely obvious and just about everything in between. I've had cases where a diagnostic program gave a HDD a clean bill of health, but you can hear it making the click of death sound and sometimes the drive just seizes up and causes the computer to hang. I've seen diagnostic programs claim a HDD was about to die at any moment, but the drive kept running great for years after. I've had RAM pass very rigorous testing patterns, but the moment you try and install an OS and it goes to unpack some of the files, you get an error which doesn't happen if you swap out the RAM.

Diagnostic programs are excellent guides at helping you figure out where to direct your efforts if you're a technician, but they are not infallible and the testing programs made available to consumers tend to be rather pedestrian. I have seen battery diagnostics claim that a battery has failed, but it still works great. I've seen battery diagnostics claim a battery is fine, but much like yours, they clearly won't hold a charge. The IC in the battery is basically programmed with statistical models as opposed to any actual monitoring circuitry. Based on a sample size of X number of batteries, the company can be up to 99.7% confident that their model will be accurate and that's what they program those ICs and diagnostic programs around. The amount of power remaining in a battery is just a best guess, it's not uncommon for those values to have quite a bit of variance in them.

So long story short, all the empirical evidence is like a comic exaggeration of the giant flashing neon sign of a finger pointing directly at a specific conclusion. Clearly you don't want to accept this conclusion because you're desperately clinging to the fact that the diagnostic programs say something different, but the diagnostic programs are wrong in this case. The sooner you come to grips with this the sooner you can go out and get a new battery and move on or just take the battery out and run off of AC power all the time.

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Ok

You're probably right. I just wish there was a way to confirm that i need a new battery before actually buying one! Are you aware of any place i can possibly try out the battery first?

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Re: battery

Such a place would be a laptop or battery shop. I'm certainly aware of shops that sell laptops. But they might be 1000's of miles from where you live, and that wouldn't be practical.

Kees

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It'd be both cheaper and easier

It'd be both cheaper and easier to just replace it. If it doesn't work, because it's the motherboard charging circuit that's bad rather than the battery, you can just take the battery back and worst case scenario is likely that you have some store credit somewhere because once they help you up off the ground from where you fell after hearing the quote for a new motherboard, you'll promptly turn around and start looking for a new laptop or say something like, "Screw this! I'll just use it on AC power!"

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Try using it and running it down to ZERO...then retry

charging. Nothing to lose at this point.

I had a similar problem with an HP Pavilion DV7.... been awhile since it happened and I'm not sure what finally fixed it...it wasn't reloading the SW

VAPCMD

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Shuts down immediately

I can't use it untill it runs down to zero because when i unplug the adaptor, the laptop shuts off immediately, even if my battery says 10% available.

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Bummer...guess I was lucky having both a 6 and 9 cell

battery for my HP. Just wish I could remember the last thing I did before it started working like it should. Since that time...I haven't had any problems with either battery. I was looking for another battery when I finally got it working.

Keep us posted.

VAPCMD

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Answer
Just do it...

You can play all you want but more often than not, its either your battery or adapter that needs replacing. You should check that the adapter plug-in is OK, not loose or somehow improper, because a broken solder land or cracked part will cause the same problem. However, batteries just don't last forever and if you had your battery over 18mos. and mainly used the adapter to keep the laptop going, then your adapter too got over-extended as the charging circuit can only do so much because it too craps out. An adapter provides a "tickle charge" to maintain battery life and then batteries generally drop-out and plainly die sooner or later. Check the pricing on both laptop battery and adapter for your model#, you may find cost isn't so bad, order both. Also, newer Li-ion type batteries have a small pcb(smart ckt) mounted on them, they too can go bad, but part of battery, replace.

tada -----Willy Happy

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(NT) It can also be internal charge regulator gone bad

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