HP dx7-3085dx laptop will not run off generic battery

December 19, 2011 at 14:50:13
Specs: Windows 7, 1.60 GHz Intel Core i7-720QM Processor
I replaced the original battery in my almost two year old HP dx7-3085dx with a $40 generic 8 cell a couple months ago. Now it won't boot off the battery. When booted while plugged in, works fine, but if I unplug it so it has to run off the battery, it shuts down, dead black screen, but the battery shows 98% available (plugged in, charging). New battery again? No more $40 generic 8 cells. Should I buy $100 HP branded 8 cell or generic "Pro" 12 cell battery? I make my living CAD drawing on this computer and cannot send it in. Local service?

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December 19, 2011 at 18:09:22
How do you know the battery is bad? Do you still have a working original?

If I made a living off a device I'd darn sure consider two or more incase of disaster. Might look at a virtual or hosted virtual machine also just in case.

1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.

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December 20, 2011 at 10:19:05
My wife and computer guru did the diagnostics while I was on the road, not using the computer. She checked out my computer with my original HP battery, my generic replacement battery, both of which showed up to be replaced, and her battery from her very similar HP computer, which functioned fine and tested OK.

I agree that I have to have a way to stay in business if something goes wrong with this computer, sooner or later, there will be a problem. I back up all working files on client computers, various jump drives, and a separate hard drive kept in a fire resistant box so that if my main work computer dies, I don't lose my files, and can work on another computer. We own five computers, three of which are pretty new, so I have a way to be OK and keep going. I might have to reload some programs, etc, but I have a plan and can deal with it.

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December 20, 2011 at 13:50:59
If the battery gets HOT rather than just warm after you have attempted to charge it for at least a half hour, or after you have been using the laptop for a while with the AC adapter plugged in, it's definitely internally shorted and you must replace it. Internally shorted batteries getting too hot have been known to cause the laptop to catch on fire.

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December 21, 2011 at 07:01:47
I have seen not sign of excessive heat, really not hot at all. I don't have or need a separate charger, usually i am plugged in and battery is fully charged, only occasionally work on battery. Now I can't even unplug it to carry it into another room without dying out, and laptop says battery is 99% available (plugged in, not charging) By the end of the week, I will have a 12 cell generic "Pro" series battery here, and if it works fine, that will be the answer.

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December 21, 2011 at 07:32:01
I haven't had a lot of experience with laptops, but I have replaced the battery with a generic one, two different brands, for two friend's latops, HP and Compaq, and they had no problems with the generic one, at least not within two years or so since replacing them.

Since it sounds like the battery is charging okay, you may have a problem with the probably separate power board inside the laptop, going by what I've seen of the insides of a few laptops, or the board may have developed a poor connection.

Have you, or is it possible someone else who has had physical access the the laptop
- dropped it, or otherwise subjected it to a physical jolt ?
- spilled liquid on it, or exposed it to liquid such as rain, or sprayed it with liquid ?

Has there been a power failure event that happened while the AC adapter was plugged in since it last worked fine on the battery alone ?

Those things are the most frequent reasons something inside the laptop has been damaged or loosened.

Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.

See response 1:

Tips about battery charging problems on Dell laptops - may apply to other makes.
See response 3 in this by iTech:

From what I've seen, the power board is usually the same board the power jack is connected to.
The problem is caused by a poor connection of the power board.

HP probably has a Maintenance manual for your laptop series you can examine.

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December 27, 2011 at 07:14:19
New battery arrived and it boots off battery even with 1% charge when first arrived, charges properly and shows proper message about how charged it is and charging. Thanks to all for ideas, glad to have it solved, I think. I will give it a little time, but it looks great.

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