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Power Supply Reverting To Battery Even When Plugged In


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#1 thesweetlycool

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Posted 07 December 2007 - 11:44 AM

My laptop is about 2 1/2 years old and running Windows XP. Recently when plugged in and on, it will suddenly decide to go to battery power, even when the cord is plugged in. The only way to get back to AC power is to unplug and then plug the power cord back in. I'll come back to my computer and I will have hibernated because it was on battery power so long.

It happens very irregularly and i seem to be able to get it to happen less frequently when I make sure the power cord has no tention on it when going into the laptop. Though im beginning to think it's the power supply since it happens at such strange times.

Any help would be appreciated, i don't know if it could be a driver that controls this, or something... i don't know.

Thanks!

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#2 garmanma

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Posted 07 December 2007 - 01:40 PM

Does the power supply module ever get hot to the touch? Does the power supply jack seem to be firmly plugged into the DC Power jack in the laptop or is it kind of sloppy? You said it doesn't happen as much when there isn't any tension on the cable, so that would be my first guess.That's usually the first thing to go or the charging circuit itself. You could take it in for a repair estimate. I would take it to a local "mom and pop" repair shop. This is their bread and butter. A big box retailer will just want to sell you a new one.
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#3 RLI

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Posted 07 December 2007 - 05:41 PM

the charging circuit in the motherboard is gone from the sound of it, means the motherboards going.

#4 thesweetlycool

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Posted 07 December 2007 - 10:04 PM

Well I sure do hope it's not the motherboard...


The power supply is never really hot the the touch and I try to lay the cord so that it goes directly into the computer, but it still happens. I've noticed that It doesn't go to batter power while the battery is CHARGING.

Im trying to figure out what might be wrong before I try to get it fixed.

#5 RLI

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Posted 08 December 2007 - 01:23 AM

it's the charging circuit of the motherboard, you keep pointing out symptoms of it.

#6 thesweetlycool

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Posted 08 December 2007 - 05:46 AM

It's still the charging circuit even though it's fine while charging and only has that symptom after the batter is completely charged?

#7 Sneakycyber

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Posted 08 December 2007 - 06:26 AM

What kind of laptop is it?
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#8 thesweetlycool

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Posted 08 December 2007 - 06:13 PM

A Compaq Presario R3000

#9 RLI

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Posted 08 December 2007 - 08:45 PM

yes.

you stated "Recently when plugged in and on, it will suddenly decide to go to battery power, even when the cord is plugged in." that tells me the circuit is failing. plus the other symptoms you've mentioned, you're better off getting a newer laptop, they had some on ebay NIB for $250 and were C2D systems.

#10 thesweetlycool

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Posted 08 December 2007 - 09:57 PM

Is this charging circuit something that can be fixed easily? I have micocomputer technicians literally at my finger tips, and im sure they'd be willing to look at it for me

#11 usasma

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Posted 09 December 2007 - 08:52 AM

It depends on which circuit is failing (and why). Locating the component that's bad is the difficult part of this repair. Most often it's the plug on the motherboard that the AC adapter plugs into. If you can get the part, most any computer tech who can solder can replace it.
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#12 garmanma

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Posted 09 December 2007 - 10:30 AM

I just bought a DC Jack for an Inspiron for $8 at a supplier on ebay
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#13 RLI

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Posted 09 December 2007 - 12:49 PM

it's a chip or series of chips on the motherboard. best thing to do is to get a newer laptop, the costs alone of fixing this one is more than what a C2D laptop is going for NIB on ebay.




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